24/01/2026
June 2nd 2025**Drug Calculations – MCQs (With Answers)
1. Convert 0.456 litres to millilitres.
A. 45.6 mL
B. 456 mL
C. 4,560 mL
D. 0.456 mL
✅ Answer: B. 456 mL
2. Convert 125 micrograms to grams.
A. 0.125 g
B. 0.00125 g
C. 0.000125 g
D. 1.25 g
✅ Answer: C. 0.000125 g
3. Convert 0.195 milligrams to micrograms.
A. 1.95 mcg
B. 19.5 mcg
C. 195 mcg
D. 1,950 mcg
✅ Answer: C. 195 mcg
4. A patient is prescribed 15 mg of lisinopril. 5 mg tablets are available. How many tablets will you give?
A. 1 tablet
B. 2 tablets
C. 3 tablets
D. 4 tablets
✅ Answer: C. 3 tablets
5. A patient is prescribed 50 mg of amitriptyline. 25 mg tablets are available. How many tablets will you give?
A. 1 tablet
B. 2 tablets
C. 3 tablets
D. 4 tablets
✅ Answer: B. 2 tablets
6. A patient is prescribed 37.5 mg of nortriptyline. 25 mg tablets are available. How many tablets will you give?
A. 1 tablet
B. 1.5 tablets
C. 2 tablets
D. 2.5 tablets
✅ Answer: B. 1.5 tablets
7. A patient is prescribed 280 mg of verapamil. Available strengths are 40 mg, 80 mg, 120 mg, and 160 mg. What is the best combination?
A. 160 mg + 80 mg
B. 120 mg + 120 mg
C. 160 mg + 120 mg
D. 80 mg + 80 mg + 80 mg
✅ Answer: C. 160 mg + 120 mg
8. A patient is prescribed 88 mg of gentamicin IM. Available strength is 20 mg/2 mL. How many millilitres will you administer?
A. 4.4 mL
B. 6.8 mL
C. 8.8 mL
D. 9.2 mL
✅ Answer: C. 8.8 mL
9. A patient is prescribed 170 mg of sodium valproate orally. Available syrup is 200 mg/5 mL. How many millilitres will you administer?
A. 3.5 mL
B. 4 mL
C. 4.25 mL
D. 5 mL
✅ Answer: C. 4.25 mL
10. A patient is prescribed 180 mg of amoxicillin orally. Available strength is 250 mg/5 mL. How many millilitres will you administer?
A. 3.0 mL
B. 3.6 mL
C. 4.0 mL
D. 4.5 mL
✅ Answer: B. 3.6 mL
11. 500 mL of sodium chloride 0.9% is to be infused over 6 hours. What is the infusion rate in mL/hour?
A. 75 mL/hr
B. 80 mL/hr
C. 83 mL/hr
D. 90 mL/hr
✅ Answer: C. 83 mL/hr
12. A 100 mL infusion is to be given over 15 minutes. What rate should the pump be set at (mL/hour)?
A. 200 mL/hr
B. 300 mL/hr
C. 400 mL/hr
D. 450 mL/hr
✅ Answer: C. 400 mL/hr
13. A 500 mL unit of blood is to be given over 3 hours using a giving set at 15 drops/mL. What drip rate is required?
A. 35 drops/min
B. 40 drops/min
C. 42 drops/min
D. 45 drops/min
✅ Answer: C. 42 drops/min
14. A patient weighing 71 kg is prescribed an antibiotic suspension at 4 mg/kg. What dose is required?
A. 244 mg
B. 264 mg
C. 284 mg
D. 304 mg
✅ Answer: C. 284 mg
15. A 66 kg patient is prescribed an infusion of 0.5 mg/kg.
What is the total dose required? A. 23 mg
B. 30 mg
C. 33 mg
D. 36 mg
✅ Answer: C. 33 mg
16. The stock solution is 250 mg/10 mL. What volume is required to give 33 mg?
A. 1.0 mL
B. 1.32 mL
C. 2.0 mL
D. 2.5 mL
✅ Answer: B. 1.32 mL
17. The drug is further diluted into 500 mL of normal saline. What is the total volume?
A. 500 mL
B. 501.32 mL
C. 510 mL
D. 520 mL
✅ Answer: B. 501.32 mL
18. The infusion is to run over 2 hours. What should the infusion pump be set at?
A. 200 mL/hr
B. 225 mL/hr
C. 250 mL/hr
D. 251 mL/hr
✅ Answer: D. 251 mL/hr
