Dose Calculation


Article Author:
Christopher Gage


Article Editor:
Tammy Toney-Butler


Editors In Chief:
Chaddie Doerr


Managing Editors:
Avais Raja
Orawan Chaigasame
Carrie Smith
Abdul Waheed
Khalid Alsayouri
Trevor Nezwek
Radia Jamil
Patrick Le
Anoosh Zafar Gondal
Saad Nazir
William Gossman
Hassam Zulfiqar
Hussain Sajjad
Steve Bhimji
Muhammad Hashmi
John Shell
Matthew Varacallo
Heba Mahdy
Ahmad Malik
Sarosh Vaqar
Mark Pellegrini
James Hughes
Beata Beatty
Beenish Sohail
Nazia Sadiq
Hajira Basit
Phillip Hynes


Updated:
6/1/2019 4:15:19 PM

Introduction

Giving medications in the medical field involves not only knowing what and when to give but also how much to administer. Dosing calculations are just as important as knowing what to give. [1]  Medications take many forms, but dispensing liquids are usually the hardest to calculate. Liquids and fluids come in different containers and concentrations but using simple math calculations can simplify this task and lower the risk of potential errors. Three formulas will help with dosing calculations.

Equipment

The equipment needed to administer fluids can vary depending on how it is going to be administered. A needle and syringe will be needed to remove a medicine or fluid from a vial. Anytime a practitioner delivers a medication through an intravenous (IV) port they must use a flush to push the drug into the IV tubing or a bag of fluid such as normal saline. When calculating infusions, it is important to use a drip chamber and know how many drops are needed to administer one mL of the fluid. There are two different styles of administration drip sets (gtt/set). One is a macro set that uses larger drops to add to 1 mL. Most macro sets are either 10, 15 or 20 drops to make 1 mL. The other drip set is a micro set, and it either takes 45 or 60 drops to make 1 mL. When giving most medications via continuous infusion, micro drip sets are the preferred method. One easy way to differentiate the two is by looking into the drip chamber. A clinician will see a micro set adapter that looks like a small silver pin coming from the bag end of the chamber. This pin causes the drops to be tiny, hence the term micro set. Some medications that are infused come in a glass vial. If this is the case, make sure to use a drip tubing that has a vent port to allow air into the bottle. Without this air entering the glass vial/bottle, the release of the fluid will eventually cause a suction, and the medication will stop flowing.

Preparation

Preparing a dose calculation is best done with the use of a calculator, particularly in a stressful situation. If not, errors are likely. One wrong decimal place can become a ten-fold error that can cause life-threatening complications for patients. [2] Knowing the three methods of dosing calculations can serve as a check and balance system to verify dose arrived at by calculator use and is recommended to avoid medication errors. An excellent way to prepare for standard drip rates and concentrations is to develop a chart with the drip rates already calculated for ease. [3] Caution should also be used when doing so. With different manufacturers and pricing wars, it is very common for a company to change the vial and concentration without notifying providers. If providers become complacent in this situation, the patient could suffer harm, and the providers might be liable.

Dose calculations should always be performed before the medicine is mixed if the practitioner is giving an infusion. Doing the math before mixing allows a person to change the numbers to reach a better drip rate. It is difficult to count 600 gtt/min using a 60 gtt/set but changing the drip set to a ten gtt/set can decrease your rate to 100 gtt/min and make your treatment more manageable.[4][5][6][7]

Technique

Volume Infusion

This method can be used when a patient needs a certain amount of IV fluid over an amount of time in minutes. This fluid can be by itself, or it can have medication mixed in the bag. The overall goal is to give the fluid over a particular time in minutes. The answer to the formula will be in drips per min.

(Volume (mL) x (gtt/set)) / Time (min) =  gtt/ min

Example: 250 mL of Normal Saline over 30 minutes with a ten gtt/set is needed. Plugging those number into the formula would tell the clinician that they need to set the drip rate at approximately 83 gtt/min or about 1.5 gtt/sec.  

Example: The clinician places 150 mg of amiodarone into a 100 mL bag of D5W with a ten gtt/set. The clinician is going to deliver the entire 150 mg over 10 minutes; therefore, it is irrelevant that the medicine is in the bag. The goal has become to give the 100 mL bag over 10 minutes. When you are using the formula with (100 mL x 10 gtt/set) divided by 10 minutes, you get 100 gtt/min or about 1.5 gtts/sec.

Bolus

This method is used when the clinician must obtain a specific amount of medicine out of a container. The answer obtained from the formula will be the amount in mL.

(Drug ordered / Drug Available) x  total mL in vial =  mL

Example: The clinician is to deliver 0.2 mg of epinephrine to a pediatric patient in a bradycardic rhythm. If using a 1:10,000 Epi concentration (1 mg in 10 mL), the formula would indicate that they must draw 2 mL from the vial.

Continuous Infusion

When giving a constant amount of medication every minute for an extended period, continuous infusion calculation can be used. Once the clinician calculates the correct drips per minute but wants to change the dose, they can just run the calculation again with the new formula. 

(Drug ordered dose (per min) x (gtt/set) / Total drug available) x total mL in infusion bag = gtt/min

Example: The clinician is treating a hypotensive patient with an epinephrine infusion at 2 mcg/min. The clinician needs to obtain the bag of fluid and the vial of epinephrine. They use one vial of Epi 1:1,000, place it into a 250 mL bag of NS, and use a 60 gtt/set. The formula would yield 30 gtt/min.

Example: The clinician is giving dopamine at 5 mcg/kg/min to a 43-year-old male who weighs 100 kg. The clinician has a 500 mL bag of NS, 400 mg of dopamine in a vial, and a 60 gtt/set. The formula would yield 37.5 gtt/min. They would, in fact, not be able to obtain 37.5 gtt/min, but one drop every 1 to 1.5 seconds will get close.

Clinical Significance

Knowing these formulas and when to use them can help practitioners to deliver the right amount of medicine to the patient. Continually keeping up with current standards of care as evidence-based practice changes will assist in medication administration safety. Often, clinicians need to think on their feet.

Enhancing Healthcare Team Outcomes

Pharmacists and nurses must know how to calculate medication doses. There are several formulas that can be used. When in doubt, a second opinion should be sought. Double checking a calculation with a 2nd team member should always be considered if there is any doubt regarding the calculation.


Interested in Participating?

We are looking for contributors to author, edit, and peer review our vast library of review articles and multiple choice questions. In as little as 2-3 hours you can make a significant contribution to your specialty. In return for a small amount of your time, you will receive free access to all content and you will be published as an author or editor in eBooks, apps, online CME/CE activities, and an online Learning Management System for students, teachers, and program directors that allows access to review materials in over 500 specialties.

Improve Content - Become an Author or Editor

This is an academic project designed to provide inexpensive peer-reviewed Apps, eBooks, and very soon an online CME/CE system to help students identify weaknesses and improve knowledge. We would like you to consider being an author or editor. Please click here to learn more. Thank you for you for your interest, the StatPearls Publishing Editorial Team.

Dose Calculation - Questions

Take a quiz of the questions on this article.

Take Quiz
A client experiencing diabetic ketoacidosis is to receive 10 units per hour of a regular insulin infusion. The pharmacy dispenses a bag that contains 100 units of insulin in 250 ml of fluid. At what rate will you deliver this infusion?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
A patient's chemotherapy prescriptions include doxorubicin 20 mg per square meter of body surface area (BSA). The patient's BSA is 1.5 square meters. What is the correct dosage for this patient?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
A suspension of amoxicillin 40 mg/kg divided three times a day is prescribed to a child who weighs 31 pounds (14 kg). How much should be given for each dose?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
A patient needs 30 mg of elemental iron daily. How many ml of ferrous sulfate oral drops, containing 75 mg/0.6 ml, should he take?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
Dipyridamole is provided in 10 ml vials. Each vial contains 50 mg of dipyridamole. What volume of dipyridamole should you administer to a 155-pound patient at 0.56 mg/kg?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
A Cs-137 source was calibrated 6 years ago, exactly. At that time it measured 145 microcuries. 137-Cs has a 30-year physical half-life, and the 6-year decay factor is 0.871. If an accuracy of +/- 10 percent is permissible, what is the acceptable range when it is measured today?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
An RT elutes 50 mCi/ml Tc99m off a generator. He then adds 4 mL of this eluate to a 16 mL kit of MDP. The order for the patient is a 20 mCi dose of Tc99m-MDP. How many mL should be withdrawn from the kit?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
How is a pediatric dose calculated?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
A MAA kit contains 950K particles per ml with 50 mCi Tc99m in 5 ml. If a 4 mCi dose is drawn up, how many particles are there?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
A child is to take 0.08 mg of digoxin by mouth daily. The solution is 0.05 mg/mL. How much should be given?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
How many milliliters are in 10 drams?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
One teaspoon of liquid is equivalent to how many mL?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
How much medication is in 100 mL of a 1% solution?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
What is the correct insulin infusion rate (U/hr) for 100 units to be given over five hours?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
What is the flow rate (mL/min) to infuse 2 liters of normal saline over 6 hours?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
What is the correct dose in a 66 pound patient who is prescribed a medication at 10 mg per kg?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
What is the flow rate of a stock heparin 1 L solution of 100,000 units with an order of 50,000 units of heparin infusion over ten hours?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
How much dextrose is given in two hours with D5W at an infusion rate of 10 mL per hour?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
How much lidocaine is given to a patient who received 10 mL of a 2 percent infusion?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
What is the correct volume that correlates with 10 teaspoons?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
A client has just had surgery and the clinician orders heparin 20,000 units to be administered subcutaneously. The heparin vial reads heparin 10,000 units/mL. How much heparin should be drawn up in the syringe to administer the correct dose?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
A patient complains of nausea and pain. You are preparing meperidine hydrochloride 100 mg and promethazine hydrochloride 12.5 mg to be administered intramuscularly. The label on the meperidine reads 50 mg/mL, and the label on the promethazine hydrochloride reads 25 mg/mL. How many milliliters should be in the syringe?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
The order reads administer ampicillin 125 mg IM every 6 hours. The child weighs 10 kg. The recommended dose for a patient weighing less than 40 kg is 25 to 50 mg/kg/day IM or IV in equally divided doses at 6 to 8-hour intervals. The drug concentration is 125 mg/5 ml. Which of the following is not a correct action?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
A patient with multiple myeloma has been prescribed 0.2 mg/kg/day of Alkeran for 5 days as a palliative to be repeated at 4-6 week intervals. The patient weighs 176 lb. How many 2-mg tablets should you dispense?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
An oral phenytoin 600 mg one-time dose is ordered for a patient having a seizure. All you have in the automated dispensing unit is 100 mg capsules. How many capsules should be pulled out to achieve the desired, prescribed dose?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
A patient has been diagnosed with a pulmonary embolism. The provider orders heparin 6000-unit bolus IV followed by a heparin drip. On the unit, heparin is supplied in 10,000 units/mL vials. How many mL should be drawn up to deliver the prescribed bolus dose?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
Standard conversions are required to solve certain drug calculations. Which of the following conversion factors is correct?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
A patient is being treated for congestive heart failure after a myocardial infarction. An order for furosemide 80 mg IV has been placed by a provider. The medication drawer only contains vials of furosemide 40 mg/4 mL. What is the correct dose?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
A client with a history of seizures presents following a witnessed seizure. While obtaining an accurate medication history, the nurse makes a discovery that the client has been prescribed lamotrigine 150 mg orally twice a day by their primary care provider. The client admits to being busy with life and forgetting to take their daily, prescribed medications. The client believes they have missed about five doses over the course of the past week. A lamotrigine 150 mg oral dose to be given immediately is ordered. The pharmacy technician hands the nurse three packages containing scored lamotrigine 100 mg tablets prepared by the pharmacist. How many tablets need to be given to the client to administer the prescribed dose safely? Select all that apply.



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
A febrile pediatric patient with pneumonia has an order for ibuprofen as needed. The order reads as follows: ibuprofen 10 mg/ kg every 8 hours prn temperature over 38 C (101 F). You wish to medicate this patient. On hand, there is ibuprofen 100 mg/5 mL suspension. The last recorded weight of the patient is 40 pounds. How many milligrams should be given?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
A patient with gastroenteritis has orders placed by the provider: lactated Ringer’s (LR) solution IV 250 mL to infuse at a rate of 75 mL/hour. The drop factor is 20 gtts/mL. How many gtts/minute are required to infuse at 75 mL/hour?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
A provider orders normal saline (NS) 1 liter IV to infuse at 150 mL/hr for a patient diagnosed with pneumonia. The drop factor for this particular tubing set is 20 gtts/mL. How many drops per minute (gtts/min) are required to achieve the desired rate?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
While rounding on a patient with rheumatoid arthritis, he reports his pain level is a seven out of ten on the numeric pain scale. An order for naproxen oral suspension 125 mg twice a day as needed for pain level seven to ten exists. On hand is naproxen oral suspension 125 mg per 5 mL. How many teaspoons (tsp) will be administered to achieve the desired dose?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
A patient presents with nausea, vomiting, and abdominal pain. Ondansetron was not successful in relieving the nausea and vomiting. Promethazine 6.25 mg IV push once has been ordered by the provider. Promethazine 25 mg/mL vials are on hand in the automated dispensing cabinet. How many milliliters (mL) will deliver the desired dose?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
A patient presents with a 4-day history of diarrhea and weakness. A provider orders lactated Ringer's solution (LR) 1000 mL to infuse over 4 hours. What flow rate is needed to infuse the solution over a 4-hour period?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
Which is used to mix two ingredients of unequal quantities?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
How many micrograms are in 2.0 mL of a 1:200 solution?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
If 200 mL of 25% (w/v) solution is diluted to 2 L, what is the percentage strength (w/v)?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
Atropine sulfate 0.2 mg to be administered subcutaneouly every 8 hours is ordered. Which of the following is the equivalent dose in micrograms?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
A syringe contains 10 mg of a drug in 1 mL of solution. How many micrograms of the drug would be administered if 0.5 mL of the solution is injected?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
How many tablets containing 500 mg of a drug are needed to provide a dose of 25 mg/kg of body weight for 1 week for a person weighing 200 lb?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
A dose of antacid is 2 tbsp. How many doses can be prepared from a 2-pint bottle?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
If a drug dose is 300 mcg, how many doses are contained in 0.120 grams?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
A 50-pound child is to receive 6 mg of a drug per kilogram of body weight. How many milliliters of a drug containing 30 mg/5 mL should the child receive?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
A child’s dose of a drug is 25 mg/kg/day divided equally into four doses. What would be the single dose in mg for a child weighing 22 pounds?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
If a child weighs 25 kg and the adult dose is 100 mg, using Clark’s rule how many milligrams should the child receive?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
How many grams are in 200 mL of a liquid if its specific gravity is 2.0?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
You are asked to prepare 1 pound of 10% (w/w) ointment. How much of the drug is needed?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
Prepare 100 mL of a 1:4 solution of drug X. You have in stock a 1:2 solution. How many milliliters of the 1:2 solution will you use?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
You are to make a 30 mL dilution of drug X with a concentration of 200 mcg/mL from a stock solution of 1 mg/mL. How much diluent is needed?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
Assume 500 mL of an IV solution of normal saline contains 0.1 g of a drug. What is the flow rate in milliliters per minute that should be administered to provide 1 mg/min of the drug?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
A heparin dose of 150 units/kg of body weight has been ordered for open-heart surgery. How many milliliters of 10,000 heparin units/mL should be administered to a 300-pound patient?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
An IV containing 500 mg of drug in 250 mL of normal saline is to be infused over 1 hr. The IV set is calibrated to deliver 25 gtts/mL. How many drops/minute should be administered?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
A provider orders 4 L of normal saline to be administered over 24 hours. How many drops per minute will be delivered using an administration set calibrated to deliver 50 drops per milliliter?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
The dose of a drug prescribed for a 44-pound child is 250 mg QID. The safe range is 10 to 50 mg/kg per day. Which of the following is the correct total daily dose? Is it safe?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
A patient weighs 44 pounds and is prescribed 10 mg of a drug IV. The safe dose is stated to be 1 mg/kg/dose. What is the correct dose, and is it safe?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
How many grams of a compound (99.9% w/w) must be added to 1 gallon of water to produce a solution containing 0.25% wt./vol. of the compound?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
How many days will a 40 mL vial of a drug last (4 mg/mL) if the patient is ordered on 6 mg q6h around the clock (ATC)?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
A pharmacist prepares a 40 mCi/mL solution of 99mTc at 6 o'clock in the morning. The solution is intended for administration at noon at a dose of 20 mCi/mL. If the half-life of the radioisotope is 6 hours, how many mL of the original solution is needed?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
The dose of a drug is 0.1 mg/kg. What dose should be given to a child that weighs 22 lbs.?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
You receive an antibiotic order in which 300,000 units of an antibiotic are to be withdrawn from a vial containing 1,000,000 units that have been dissolved in 10 mL of normal saline. How many mL should be drawn up in a syringe?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
A provider has ordered a patient to receive 80 mg of a drug. The pharmacist sends a 10 ml vial that contains 200 mg/ml. How much volume should the nurse draw up?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
The provider has ordered 37.50 mg of a medication. The pharmacist sends over a 2 ml vial that contains 50 mg. What volume of the drug should be used?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
You need to add 30 units of regular insulin to a total parenteral nutrition (TPN) solution. The pharmacist sends over a vial that contains 100 units of regular insulin in 5 mL. What volume of regular insulin should be taken up in a syringe?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
The provider ordered 0.25 mg of a drug to be given intravenously. The patient was accidently given 2.5 mg. This was how many times the ordered dose?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
A patient has been admitted with hypokalemia. The pharmacist suggests using a 3% potassium chloride solution for infusion in 500 mL of saline. How much total potassium will be infused in 500 mL?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
How many micrograms are in 1 gram?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
Which is not needed when calculating the dose of drugs in children?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
A patient with a pulmonary embolism is admitted to the hospital. The pharmacist sends a vial containing 10,000 units of heparin in 10 mL. The nurse is told to give 5000 units of heparin as a bolus. How much volume should the nurse draw up in a syringe?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
Today you have been floated to the pediatric unit and are about to start making rounds. Upon entering the room of your first patient who has been diagnosed with status epilepticus, you note seizure-like activity. An order for diazepam 3.75 mg IV push as needed for seizures that may repeat times one dose after 5 minutes exists on the medication administration record. You verify the dose with the package insert and drug reference text. The recommended safe dose is 0.3 mg/kg over 2 minutes IV/IO up to 10 mg maximum dose in children. On hand, you have 5 mg/mL vials. The admission weight was 33 pounds. What is the recommended safe maximum mg dose for this patient?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
A provider places an order for intravenous fluids to correct a volume deficit in your patient with intractable nausea and vomiting. The order reads as follows: LR 500 mL bolus IV to infuse at 125 mL/h. How many hours will it take to infuse the amount requested?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
A young male presents with a complaint of diarrhea for 2 days. You anticipate an order for intravenous fluids and check the medication administration record. Indeed, lactated Ringer's (LR) solution at 150 mL/hr to infuse over 6 hours intravenously has been placed by the provider. How many milliliters will the patient receive of LR solution in the time frame specified by the order?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
A provider orders acetaminophen elixir for a pediatric patient that is febrile. What is the proper technique when measuring a dose of liquid medicine from a medication cup?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
Medication administration comes with some degree of danger or risk. Overdose potential is ever present. Thus particular fail-safes are built into some policies and institutional guidelines to reduce this risk potential. Some institutions employ the use of rounding down instead of rounding off. In what patient populations is rounding down encouraged by some hospitals?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
An order is written for piperacillin/tazobactam 4.5 grams IVPB stat for one dose pre-op for your patient with acute appendicitis. On hand, you have dextrose 5% solution in 100 mL bags to reconstitute medication. Today, there is a shortage on pumps, so you must figure out the drip rate. You have standard IV tubing with a drop factor of 10 gtts/mL. How many gtts/min will deliver this medication over a thirty-minute time frame, rounding off to the nearest whole number?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
A provider prescribes a brand name medication for a patient with hypothyroidism. This medication comes in 1/4 grain tablets. The order reads for 1/2 grain by mouth daily. How many tablets should you administer to carry out this order, employing the Ratio and Proportion Method of drug calculations to assist you?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
A child presents with a 2-day history of crying intermittently, fever, and pulling at the right ear. A diagnosis of otitis media is made, and a prescription for oral azithromycin 250 mg daily for 3 days is provided. The child's measured weight is 46 pounds. The safe dose amount is 10 mg/kg/day according to the latest reference guide. Does this prescribed dose fall within the safe dosing guidelines?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
A child with a seizure disorder history had two seizures today. Phenobarbital 125 mg orally three times per day (TID) is ordered. The weight of the child on the pediatric scale is 60 pounds. Safe dosage recommendations for phenobarbital are 2 mg/kg TID. What is the weight of this child in kilograms, and is this a safe dose for this child?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
A female client presents with chest pain, tachycardia, orthopnea, a pulse oximetry reading of 86% on room air, and right leg swelling. She has been diagnosed with deep vein thrombosis (DVT) and subsequent pulmonary embolus (PE). An order for heparin weight-based protocol, bolus, and continuous infusion is initiated. The protocol calls for an 80 unit/kg bolus IV dose for DVT or PE, and 60 unit/kg bolus IV for non-ST-elevation myocardial infarction (NSTEMI). The client's bed scale weight measured on arrival was 110 pounds. How many units will this client receive as an IV bolus dose of heparin? Select all that apply.



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
A female patient presents with chest pain, tachycardia, orthopnea, pulse oximetry reading of 86% on room air and right leg swelling. She has a diagnosis of deep vein thrombosis (DVT) and subsequent pulmonary embolus (PE). An order for heparin weight based protocol, bolus, and drip, is ordered. The protocol calls for an infusion of 20 units/kg/hr for DVT/PE. Patient bed scale weight measured on arrival was 110 pounds. How many units/hr should this patient receive of heparin if you have 25,000 units/500 mL premixed bags stocked on your unit?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
A female patient presents with chest pain, tachycardia, orthopnea, pulse oximetry reading of 86% on room air and right leg swelling. She has a diagnosis of deep vein thrombosis (DVT) and subsequent pulmonary embolus (PE). An order for heparin weight based protocol, bolus, and drip, is initiated by a provider. The protocol calls for an infusion of 20 units/kg/hr for DVT/PE. Patient bed scale weight measured on arrival was 110 pounds. How many mL/hr should this patient receive of Heparin via infusion pump if you have 25,000 units/500 mL premixed bags stocked on your unit?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
You are working an extra shift to cover in a pediatric unit. You realize you must be extra cautious because you are in an unfamiliar unit. You remember that in pediatric patients you must determine if a dose of medication is safe to administer before actually giving it. Your first patient weighs 25 kg. The safe daily dose is 4 mg/kg/day. How many milligrams per day is a safe amount?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
A provider orders amoxicillin 75 mg by mouth every 8 hours for a child who weighs 40 kg. If safe dosage range is 6 to 8 mg/kg/day, what is the maximum safe daily dose for this patient and is the order safe to carry out?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
A provider orders amoxicillin 75 mg by mouth every 8 hours for a child who weighs 40 kg. If safe dosage range is 6 to 8 mg/kg/day, what is the lower limit of the safe maximum daily dose range for this patient, and is the order safe to carry out?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
Cephalexin 250 mg orally four times daily has been ordered for a child weighing 50 pounds. The daily safe dose range is 25 mg/kg/day to 50 mg/kg/day. The pharmacist dispenses a 125 mg/2 mL suspension for this patient. What is the maximum, safe, daily, individual dose for this child, and is the ordered amount safe to give?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
Which of the following is the largest amount?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
A patient receives a prescription instructing him to take 1 tablespoon of a cough syrup three times a day. The label should instruct the patient to take which of the following?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
Your order is for cephalexin 500 mg bid. Your stock is cephalexin suspension, 100 mg/ml. How much cephalexin is in a single dose?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
What would be the estimated plasma concentration of a drug if a 75 mg IV bolus is given to a 210 lb patient with a volume of distribution (Vd) of 1.5 L/kg?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
There are two factors that mostly affect parenteral infusion rate (R). One is total clearance (CL). What is the other?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
A patient with diabetes mellitus is dosed at 5 units per hour of regular insulin. A 500 mL bag of normal saline with100 units of added insulin is dispensed. What is the correct infusion rate?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
A patient with bladder cancer is receiving combination treatment that includes doxorubicin dosed at 40 mg per square meter. The patient is 1.68 square meters. What is the dose?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
You receive a prescription for a 12-year-old child who has pharyngitis. It calls for 250 mg of penicillin V per dose. How many units is the equivalent of 250 mg?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
A patient is receiving an intravenous antibiotic that is infused at 100 mL per hour, and the drop factor for the infusion is 15 gtt/mL. What is the flow rate?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
In order to be isotonic with human blood how many mOsm/L would be in a parenteral solution?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
A post-arrest patient remains bradycardic after atropine and an epinephrine infusion, and the transcutaneous pacer was unable to maintain capture. The cardiologist wants an isoproterenol drip started at 0.1 mcg/kg/min. The infusion was mixed by placing 4 milligrams of isoproterenol in 250 mL of D5W. The patient’s weight is 176 lbs. What would you set the rate using a micro set?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
After converting a patient in ventricular tachycardia to sinus rhythm, the patient is placed on a lidocaine infusion. The infusion is prepared by placing 1 gram of lidocaine in 250 milliliters of normal saline. What is the concentration in the infusion?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
A patient was receiving 40 mg of hydrocortisone intravenously every 6 hours. As she improved, her practitioner wished to switch her to oral prednisone in preparation for her discharge. What would be the equivalent daily oral prednisone dose to her hydrocortisone dose?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
A patient is to receive atropine sulfate via a pen injector, 6 mg IM X 1 dose. What is the dose in micrograms (mcg)?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
A patient is to receive 5 mg of warfarin on Monday, Wednesday, and Friday. On Tuesday, Thursday, Saturday, and Sunday they are to get 3 mg. What is the total weekly dose?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
A 110 pound pediatric patient with seizure disorder is to be given phenytoin 5 mg/kg daily dose divided twice daily. You will be administering phenytoin oral suspension 25 mg/ml. How many ml will be in one dose?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
You have a pre-filled syringe of drug X at 20 mg per 2 ml. If you inject 0.5 ml, how many micrograms (mcg) will the patient receive?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
Dimercaprol is used to treat acute lead, arsenic, gold, and mercury poisoning. Normal dosing is 2.5 to 5 mg/kg per dose intramuscular for a specific number of doses or time period, depending on the particular toxicity. What is the dosing range for a 175-pound patient?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
You receive an order for aminophylline 500 mg IV daily divided q6h. Your stock is 25 mg/ml. How many ml will you need for one dose?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
You are preparing a pediatric dose of a drug that is to be given 750 micrograms/kg. Your patient is 62 pounds. What is the dose in mg?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
You receive an order for a medication to be dosed 750 micrograms. Your stock vial is labeled 5 mg/ml. How many ml will be needed to obtain the ordered dose?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
A patient is to receive a 600 mg dose of amikacin. The stock vial contains 250 mg/ml. What is the calculated dose in ml for this patient?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
You have a drug vial containing 1,000,000 units of penicillin G. Directions for reconstitution call for the addition of 2.3 mL of sterile water. There are 500,000 units in 1.2 mL of the reconstitution. How many mL are needed to get 300,000 units?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
A patient has an order for 8 units of vasopressin 4 times daily. The stock vial contains 20 units/mL. How many mL will you administer per dose?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
You receive an order for a 350,000 unit loading dose of urokinase for a pulmonary embolism patient. Your stock vial contains 500,000 units and will be reconstituted with 10 mL of sterile water. How many mL will you administer in the loading dose?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
If a potassium solution contains 40 mEq per tablespoon, how many mL will be needed to administer 20 mEq?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
A drug is dosed at 150 micrograms. How many complete doses would be obtainable from a 0.125 gram supply?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
You receive a prescription for a pediatric patient for cephalexin 50 mg/kg per day divided q12h for 10 days. The patient weighs 88 pounds. If the suspension contains 250 mg/5 mL, how many mL of the suspension should be dispensed?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
If cefazolin is to be dosed 150 mg/kg IV divided q8h X 10 days, what is the single dose in mg for a 55-pound child?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
If a child is 11 years old, weighs 70 pounds, and the adult dose of a drug is 500 mg, what is the pediatric dose according to Young's rule?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
If a child is 3.5-year-old, weighs 30 pounds, and the adult dose of a drug is 100 mg. What is the pediatric dose according to Young's rule?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
An 11-year-old pediatric patient weighs 32 kg and the adult dose of a drug is 500 mg, what is the child's dose using Clark's rule?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
A 7-year-old pediatric patient weighs 50 pounds, and the adult dose of a drug is 1 tablespoon. What is the child's dose using Clark's rule?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
How many grams of sodium chloride would be in a 500 mL bag of one-half normal saline?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
How many grams would be in 1 liter of a 1:150 (w/v) solution?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
How many micrograms of solute drug are in 2 mL of a 1:100 (w/v) solution?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
How many ml of a 5% (w/v) solution are needed to make 8 ounces of a 1:100 solution?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
An order comes in for 120 ml of 2% acetic acid solution. Your stock bottle is 50% acetic acid solution. How many ml of the 50% solution will be needed to fill your order?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
You are tasked to prepare 120 ml of a 60% (v/v) lidocaine solution. Your stock solution is 75%. How much of the stock solution will you need to prepare the final product?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
You have a stock bottle of drug X that is a 1:20 (w/v) suspension. How many mL of the stock suspension will be needed to prepare 60 mL of 1:50 (w/v) solution?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
You are asked to prepare 240 mL of drug X in a 1:20 (w/v) suspension. How much of your stock 1:8 suspension of drug X will be required to complete the order?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
You have a stock bottle of metoclopramide 5 mg/mL. How much of the solution is needed to make 30 mL of a 0.5 mg/mL solution?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
In order to prepare 15 mL of cefazolin at 50 mg/mL, how much solvent will need to be added to the proper amount of 1 gram/5 mL cefazolin solution?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
Starting with 1 mg/mL stock solution of cyanocobalamin, how much solution and diluent would be needed to make 60 mL of 100 micrograms/mL solution?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
You are to prepare 60 mL of 25% metronidazole solution. Your stock solution is 8 grams/5 mL. How much of the stock solution will be needed to fill the order?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
What volume of 90% (v/v) isopropanol would be required to prepare 500 mL of a 70% (v/v) solution?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
To initiate thromboembolism treatment, heparin is to be dosed as a bolus at 80 units/kg X 1. How many mL of heparin containing 5,000 units per mL will be needed to dose a 181-pound male patient?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
Your patient is to receive 10 mg/kg of a medication. How much will he receive if he weighs 176 lbs?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
How many 250 mg doses can be prepared from a 15-gram container of a drug?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
How many grams of active ingredient would be in 100 mL of 1:10,000 solution?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
A patient is to receive a 1-liter infusion of D5/NS with 10 mEq of magnesium over a 12 hour period. What is the flow rate in mL per minute?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
An infusion is delivered over a 12-hour period. The total volume administered is 750 mL. What is the flow rate in mL/.min if the IV set is set to 15 gtt/mL?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
How many 5 gr tablets would be needed to make 1.3 L of a 1:200 solution?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
The patient is to receive 1,000 mL of D5W over 5 hours. If the drop set is calibrated to 10 gtt/mL, what will the flow rate be in gtt/min?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
You receive a prescription with the following directions: "#60, 1 cap tid". How many days supply of the medication is this?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
A patient is to receive 120 mg of gentamicin in 2540 mL of D5W over 60 minutes every 12 hours, using a 10 gtt/mL kit. What is the rate in gtt/min?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
If 1 liter of D5W is infused over 6 hours, what is the flow rate in mL/min?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
You have a 3 grain tablet. How many milligrams is this pill?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
The pharmacy receives the following prescription: 1 TSP TID #120 ml. How many days supplies will this prescription be for if the patient is instructed to take the medication until it is finished?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
You have a pint of 10% stock solution. How many mL of 1:50 (w/v) strength can be prepared from this stock?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
You have 40 g of salicylic acid and you want to dissolve it in a liquid medium to create a 25% solution (w/v). What will the final volume be?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
A one-liter bag of lactated Ringer's solution is to be infused over an 8 hour time period. What is the flow rate?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
A patient in to receive fluorouracil at a rate of 15 mg/kg/day for 5 days. The patient weighs 176 lbs. How many total grams will he receive during the 5-day course?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
A patient weighs 176 lbs and is to receive 30 mg/kg daily in 3 divided doses. What is the daily dose in mg for this patient?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
Of the following formulae for determining a pediatric drug dose, which one provides the greatest accuracy?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
A 19 lb child is to receive a drug dosed at 30 mg/kg every 12 hours. How many mg will the child receive each day?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
You receive an order for the following compound; dibucaine 1%, diltiazem 2%, aloe vera qs. How much diltiazem will you be dispensing in a 90 g supply?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
A patient purchases a 2 oz tube of over the counter hydrocortisone cream. How much hydrocortisone is in the tube?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
You receive a prescription for guaifenesin with codeine with the following signa: "5 cc PO q4h PRN; QS 7 days". How many mL will you dispense?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
You have prepared an order for furosemide suspension 4 mg/mL. If the patient is to receive 20 mg BID x 10 days, how much would you dispense for a unit dose?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
You are to prepare a suspension using ground up 600 mg tablets for a patient who cannot swallow tablets whole. If the patient is to receive 1.8 g per day, how many tablets are needed to prepare one day's dose?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
You are tasked to prepare 900 mL of a 1:5,000 strength solution of a drug. Using 30 mg tablets to prepare the solution, how many will you need?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
You are to make a 60 g quantity of 2% ointment. In stock, you have 1% and 5% ointment. How much of each must you use to make the 2% ointment?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
In stock you have supplies of 2% ointment and 10% ointment. How many grams of each will you need to make 60 g of 5% ointment?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
How many 5 gr tablets will you need to make 500 mL of a 1:500 solution?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
How many grams of dextrose are in 750 mL of D5W?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
You have 500 mL of stock 70% (w/v) solution. How much pure water would you need to add to dilute the solution to 40%?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
A client who weighs 15 kg is diagnosed with meningitis. The recommended safe dose of ampicillin is 25 to 50 mg/kg/day intravenously every 6 to 8 hours. The concentration is 125 mg/5 mL. The dose prescribed is 125 mg IV every 6 hours. Which of the following is reasonable in safe practice? Select all that apply.



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up

Dose Calculation - References

References

Medication calculation and administration workshop and hurdle assessment increases student awareness towards the importance of safe practices to decrease medication errors in the future., Wallace D,Woolley T,Martin D,Rasalam R,Bellei M,, Education for health (Abingdon, England), 2016 Sep-Dec     [PubMed]
Boyle MJ,Eastwood K, Drug calculation ability of qualified paramedics: A pilot study. World journal of emergency medicine. 2018;     [PubMed]
Eastwood K,Boyle MJ,Williams B, Undergraduate paramedic students cannot do drug calculations. World journal of emergency medicine. 2012;     [PubMed]
Black S,Lerman J,Banks SE,Noghrehkar D,Curia L,Mai CL,Schwengel D,Nelson CK,Foster JMT,Breneman S,Arheart KL, Drug Calculation Errors in Anesthesiology Residents and Faculty: An Analysis of Contributing Factors. Anesthesia and analgesia. 2019 Jun;     [PubMed]
Kooshyar MM,Maruzi A,Fani Pakdel A,Elyasi S,Taghizadeh-Kermani A,Akbarzadeh M,Aledavood SA, Adherence to a Standardized Chemotherapy Order form for Colorectal Cancer in a Referral Teaching Hospital, Mashhad, Iran. Iranian journal of pharmaceutical research : IJPR. 2019 Winter;     [PubMed]
Park JM,Kim JI,Park SY, Modulation indices and plan delivery accuracy of volumetric modulated arc therapy. Journal of applied clinical medical physics. 2019 Apr 30;     [PubMed]
Kaufmann J,Laschat M,Wappler F, [Safe Paediatric Anaesthesia: Update on Drug Safety]. Anasthesiologie, Intensivmedizin, Notfallmedizin, Schmerztherapie : AINS. 2018 Nov;     [PubMed]

Disclaimer

The intent of StatPearls is to provide practice questions and explanations to assist you in identifying and resolving knowledge deficits. These questions and explanations are not intended to be a source of the knowledge base of all of medicine, nor is it intended to be a board or certification review of Nurse-Child Health PN. The authors or editors do not warrant the information is complete or accurate. The reader is encouraged to verify each answer and explanation in several references. All drug indications and dosages should be verified before administration.

StatPearls offers the most comprehensive database of free multiple-choice questions with explanations and short review chapters ever developed. This system helps physicians, medical students, dentists, nurses, pharmacists, and allied health professionals identify education deficits and learn new concepts. StatPearls is not a board or certification review system for Nurse-Child Health PN, it is a learning system that you can use to help improve your knowledge base of medicine for life-long learning. StatPearls will help you identify your weaknesses so that when you are ready to study for a board or certification exam in Nurse-Child Health PN, you will already be prepared.

Our content is updated continuously through a multi-step peer review process that will help you be prepared and review for a thorough knowledge of Nurse-Child Health PN. When it is time for the Nurse-Child Health PN board and certification exam, you will already be ready. Besides online study quizzes, we also publish our peer-reviewed content in eBooks and mobile Apps. We also offer inexpensive CME/CE, so our content can be used to attain education credits while you study Nurse-Child Health PN.