CMT Dosage Calculation and Measurement 2 — Questions and Answers
Question 1: A physician orders amoxicillin 250 mg. The available suspension is 125 mg/5 mL. How many mL should you administer?
- 5 mL
- 10 mL (Correct answer)
- 15 mL
- 20 mL
Correct answer: 10 mL
250 mg ÷ 125 mg × 5 mL = 10 mL.
Question 2: Which measurement system uses grains, drams, and ounces?
- Metric system
- Apothecary system (Correct answer)
- Household system
- SI system
Correct answer: Apothecary system
The apothecary system is an older system using grains, drams, and ounces.
Question 3: How many micrograms (mcg) are in 1 milligram (mg)?
- 10 mcg
- 100 mcg
- 1,000 mcg (Correct answer)
- 10,000 mcg
Correct answer: 1,000 mcg
1 mg = 1,000 mcg in the metric system.
Question 4: A resident needs 0.5 g of a medication. The tablets available are 250 mg each. How many tablets should be given?
- 1 tablet
- 2 tablets (Correct answer)
- 3 tablets
- 4 tablets
Correct answer: 2 tablets
0.5 g = 500 mg; 500 mg ÷ 250 mg = 2 tablets.
Question 5: A medication order reads: ibuprofen 400 mg PO q8h. How many milligrams will the resident receive in 24 hours?
- 400 mg
- 800 mg
- 1,200 mg (Correct answer)
- 1,600 mg
Correct answer: 1,200 mg
q8h means every 8 hours = 3 doses/day; 400 mg × 3 = 1,200 mg.
Question 6: How many tablespoons are equivalent to 1 fluid ounce in the household measurement system?
- 1 tablespoon
- 2 tablespoons (Correct answer)
- 3 tablespoons
- 4 tablespoons
Correct answer: 2 tablespoons
1 fluid ounce = 2 tablespoons in the household system.
Question 7: A nurse practitioner orders: metformin 1 g PO BID. The tablets are 500 mg. How many tablets per dose?
- 0.5 tablet
- 1 tablet
- 2 tablets (Correct answer)
- 4 tablets
Correct answer: 2 tablets
1 g = 1,000 mg; 1,000 mg ÷ 500 mg = 2 tablets per dose.
CMT Dosage Calculation and Measurement 2
A physician orders amoxicillin 250 mg.
The available suspension is 125 mg/5 mL.
How many mL should you administer?