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Dosage Calculation Exam
Total Questions : 49
Showing 10 questions, Sign in for moreThe client is ordered to receive 40 mg of atorvastatin PO daily. In the medication cabinet, you find 10 mg tablets. How many tablets will you administer to the client? (Enter a numerical value only)
Explanation
Identify the desired dose: The doctor has ordered 40 mg of atorvastatin.
Identify the available tablet strength: Each tablet contains 10 mg of atorvastatin.
Set up the calculation: We need to find out how many tablets are needed to administer 40 mg of the medication.
We can use the following formula:
(Desired dose) / (Tablet strength) = Number of tablets
Plug in the values and calculate:
(40 mg) / (10 mg/tablet) = 4 tablets
A client is prescribed levothyroxine 200 mcg PO daily before breakfast. In the medication room are tablets labelled 0.05 mg/tablet. How many tablet(s) will you administer to the client? Fill in the blank with a numeric value. Answer to the nearest whole tablet
Explanation
Convert micrograms (mcg) to milligrams (mg):
The prescribed dose is 200 mcg.
We know that 1 mg = 1000 mcg.
Therefore, 200 mcg = 200 / 1000 = 0.2 mg.
Calculate the number of tablets:
Each tablet contains 0.05 mg of levothyroxine.
The desired dose is 0.2 mg.
We can use the following formula: (Desired dose) / (Tablet strength) = Number of tablets
(0.2 mg) / (0.05 mg/tablet) = 4 tablets
The order reads "amoxicillin 20mg/kg/dose PO every 8 hours." The child weighs 33 pounds. Using the label below, how many mL will you administer per dose? (Enter a number only, answer to the nearest tenths place)
Explanation
1. Convert the child's weight from pounds to kilograms:
There are approximately 2.2 pounds in 1 kilogram.
33 pounds / 2.2 pounds/kg = 15 kg (approximately)
2. Calculate the total milligrams of amoxicillin needed per dose:
The order is for 20 mg/kg/dose.
The child weighs 15 kg.
20 mg/kg * 15 kg = 300 mg
3. Determine the concentration of the amoxicillin suspension:
The label shows the concentration is 125 mg/5 mL.
4. Set up a proportion to find the volume (in mL) needed:
125 mg / 5 mL = 300 mg / x mL
5. Solve for x:
Cross-multiply: 125x = 300 * 5
125x = 1500
x = 1500 / 125
x = 12 mL
Answer: You will administer 12 mL per dose.
The prescription reads for diphenhydramine 10 mg PO every 4-6 hours as needed for runny nose and allergy symptoms. Using the label below, how many mL will the nurse teach the parent to administer? Enter a numeric value only. Answer to the nearest whole mL
Explanation
1. Determine the concentration of the diphenhydramine:
The label states 12.5 mg/5 mL.
2. Set up a proportion to find the volume (in mL) needed:
12.5 mg / 5 mL = 10 mg / x mL
3. Solve for x:
Cross-multiply: 12.5x = 10 * 5
12.5x = 50
x = 50 / 12.5
x = 4 mL
Answer: The nurse should teach the parent to administer 4 mL.
The prescription reads for guaifenesin 400 mg PO every 4 hours as needed for congestion. Using the label below, how many mL will the nurse administer to the client? Enter a numeric value only. Answer to the nearest whole mL.
Explanation
1. Determine the concentration of the guaifenesin:
The label states 100 mg/5 mL.
2. Set up a proportion to find the volume (in mL) needed:
100 mg / 5 mL = 400 mg / x mL
3. Solve for x:
Cross-multiply: 100x = 400 * 5
100x = 2000
x = 2000 / 100
x = 20 mL
Answer: The nurse will administer 20 mL to the client.
A client who weighs 45kg is ordered to receive 500 mg of amoxicillin every eight hours. The dosing range noted in the Davis Drug Guide is 20 to 40 mg/kg/day divided and to be given every 8 hours. True or False: the client's dose is safe and therapeutic?
A client is ordered to receive 1000ml of 0.9% saline over 4 hours. At what rate will the nurse set the IV pump in mL/hr? (Enter a number only).
Explanation
Identify the total volume:
The client is ordered to receive 1000 mL of 0.9% saline.
Identify the infusion time:
The infusion time is 4 hours.
Set up the calculation:
We need to find out the IV pump rate in mL/hr. We can use the following formula:
(Total volume) / (Infusion time) = IV pump rate
4. Plug in the values and calculate:
(1000 mL) / (4 hours) = 250 mL/hr
A client is to be started on a heparin intravenous infusion at 2,000 units per hour. On hand is an IV bag labeled 25,000 units/ 250 mL. At what rate (mL/hour) will the nurse set the pump? (Answer to the nearest whole number)
Explanation
Identify the total units of heparin in the bag:
The IV bag contains 25,000 units of heparin in 250 mL.
Identify the desired hourly dose:
The client is ordered to receive 2,000 units of heparin per hour.
Calculate the mL containing 2,000 units:
We can set up a proportion:
(25,000 units) / (250 mL) = (2,000 units) / (x mL)
Solving for x, we get:
x = (2,000 units x 250 mL) / 25,000 units x = 20 mL
You are administering an otic drop for an ear infection to a 12-year-old client. What is the proper method for otic drop instillation in this client?
When given a scheduled morning medication, the client states, "I haven't seen that pill before. Are you sure it's correct?" The nurse checks the medication administration record and verifies that it is listed. Which is the nurse's best response?
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