Dosage Calculation Test – 40 Questions (ATI Format)
1.
The provider prescribes amoxicillin 500 mg PO every 8 hours. The pharmacy sends 250
mg tablets. How many tablets should the nurse administer per dose?
A. 1
B. 2
C. 1.5
D. 0.5
Answer: B. 2
Rationale: 500 mg ÷ 250 mg/tablet = 2 tablets
2.
Order: Furosemide 40 mg IV push. Available: 10 mg/mL. How many mL will the nurse
administer?
A. 2 mL
B. 4 mL
C. 6 mL
D. 10 mL
Answer: B. 4 mL
Rationale: 40 mg ÷ 10 mg/mL = 4 mL
3.
Order: Acetaminophen 15 mg/kg. Patient weight: 66 lb. Available: 160 mg/5 mL. How
many mL should be given?
A. 7.5 mL
B. 10.3 mL
C. 14 mL
D. 7.1 mL
Answer: B. 10.3 mL
Rationale:
66 lb ÷ 2.2 = 30 kg
15 mg × 30 = 450 mg
450 mg ÷ (160 mg/5 mL) = 14.06 mL
, Correction: Answer should be C. 14 mL
4.
Order: IV infusion of 1,000 mL NS over 8 hr. Drop factor: 15 gtt/mL. What is the flow
rate in gtt/min?
A. 20
B. 25
C. 31
D. 45
Answer: C. 31
Rationale:
1,000 mL ÷ 8 hr = 125 mL/hr
(125 × 15) ÷ 60 = 31.25 gtt/min
5.
The provider prescribes 1.5 g of ceftriaxone. The vial contains 500 mg/mL. How many mL
should the nurse give?
A. 2 mL
B. 3 mL
C. 4 mL
D. 5 mL
Answer: B. 3 mL
Rationale: 1.5 g = 1500 mg
1500 ÷ 500 = 3 mL
6.
Order: Heparin 6,000 units subcut every 12 hr. Available: Heparin 10,000 units/mL. How
many mL should the nurse administer?
A. 0.4 mL
B. 0.5 mL
C. 0.6 mL
D. 0.8 mL
Answer: C. 0.6 mL
1.
The provider prescribes amoxicillin 500 mg PO every 8 hours. The pharmacy sends 250
mg tablets. How many tablets should the nurse administer per dose?
A. 1
B. 2
C. 1.5
D. 0.5
Answer: B. 2
Rationale: 500 mg ÷ 250 mg/tablet = 2 tablets
2.
Order: Furosemide 40 mg IV push. Available: 10 mg/mL. How many mL will the nurse
administer?
A. 2 mL
B. 4 mL
C. 6 mL
D. 10 mL
Answer: B. 4 mL
Rationale: 40 mg ÷ 10 mg/mL = 4 mL
3.
Order: Acetaminophen 15 mg/kg. Patient weight: 66 lb. Available: 160 mg/5 mL. How
many mL should be given?
A. 7.5 mL
B. 10.3 mL
C. 14 mL
D. 7.1 mL
Answer: B. 10.3 mL
Rationale:
66 lb ÷ 2.2 = 30 kg
15 mg × 30 = 450 mg
450 mg ÷ (160 mg/5 mL) = 14.06 mL
, Correction: Answer should be C. 14 mL
4.
Order: IV infusion of 1,000 mL NS over 8 hr. Drop factor: 15 gtt/mL. What is the flow
rate in gtt/min?
A. 20
B. 25
C. 31
D. 45
Answer: C. 31
Rationale:
1,000 mL ÷ 8 hr = 125 mL/hr
(125 × 15) ÷ 60 = 31.25 gtt/min
5.
The provider prescribes 1.5 g of ceftriaxone. The vial contains 500 mg/mL. How many mL
should the nurse give?
A. 2 mL
B. 3 mL
C. 4 mL
D. 5 mL
Answer: B. 3 mL
Rationale: 1.5 g = 1500 mg
1500 ÷ 500 = 3 mL
6.
Order: Heparin 6,000 units subcut every 12 hr. Available: Heparin 10,000 units/mL. How
many mL should the nurse administer?
A. 0.4 mL
B. 0.5 mL
C. 0.6 mL
D. 0.8 mL
Answer: C. 0.6 mL
