Pharmacology- Chapter 5
Dosage Calculations well illustrated
questions and answers
1.A dose of 0.125 mg of digoxin was ordered for a patient who has been having trouble swallowing.
The bottle of digoxin elixir reads 0.05 mg/mL. How much would you give? Dose to give
[ml}=desired dose[mg] over available concentration[mg/ml]
a. 5 mL
b. 0.5 mL
c. 2.5 mL
d. 2 mL - Answer - c. 2.5 mL
a. 0.9 mg
b. 1.8 mg
c. 9 mg
d. 18 mg - Answer - c. 9 mg
An order is written for 700 mg of ampicillin PO. The drug is supplied in liquid form as 1 g/3.5 mL. How
much of the liquid should be given?
a. 5.25 mL
b. 2.55 mL
c. 6.25 mL
d. 2.45 mL - Answer - d. 2.45 mL
An order is written for 1,000 mL of normal saline to be administered IV over 10 hours. The drop factor
on the IV tubing states 15 drops/mL. What is the IV flow rate?
a. 50 mL/h at 50 drops/min
b. 100 mL/h at 25 drops/min
Dosage Calculations well illustrated
questions and answers
1.A dose of 0.125 mg of digoxin was ordered for a patient who has been having trouble swallowing.
The bottle of digoxin elixir reads 0.05 mg/mL. How much would you give? Dose to give
[ml}=desired dose[mg] over available concentration[mg/ml]
a. 5 mL
b. 0.5 mL
c. 2.5 mL
d. 2 mL - Answer - c. 2.5 mL
a. 0.9 mg
b. 1.8 mg
c. 9 mg
d. 18 mg - Answer - c. 9 mg
An order is written for 700 mg of ampicillin PO. The drug is supplied in liquid form as 1 g/3.5 mL. How
much of the liquid should be given?
a. 5.25 mL
b. 2.55 mL
c. 6.25 mL
d. 2.45 mL - Answer - d. 2.45 mL
An order is written for 1,000 mL of normal saline to be administered IV over 10 hours. The drop factor
on the IV tubing states 15 drops/mL. What is the IV flow rate?
a. 50 mL/h at 50 drops/min
b. 100 mL/h at 25 drops/min
