Dosage calculations worksheet with answers

Free printable Dosage calculations worksheet: 6 problems from easy to exam level, with an answer key. Print it or save it as a PDF.

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Name: ____________________   Date: ____________

1.Easy
? × 25 mg

A patient is prescribed 50 mg of a drug 3 times a day for 10 days. The tablets contain 25 mg each. How many tablets N are needed for the whole course?

50 mg3× per day10 days25 mg/tablet
N = tablets
2.Easy
? × 20 mg

A patient is prescribed 40 mg of a drug. The tablets on the ward contain 20 mg each. How many tablets n do you give?

40 mg20 mg/tablet
n = tablets
3.Medium
18 kg7.5 mg/kgD = ? mg

A patient weighs 18 kg and is prescribed 7.5 mg/kg as a single dose. Find the dose D in mg.

18 kg7.5 mg/kg
D = mg
4.Medium
1 g+ 3.4 mLV = ? mL

A vial contains 1 g of powder. The label says: add 3.4 mL of water for injection to give a total volume of 4 mL. The prescription is 200 mg. What volume V of the reconstituted solution do you give?

1 g+ 3.4 mL → 4 mL200 mg
V = mL
5.Hard
100 mg/5 mLV = ? mL

A child weighing 8 kg is prescribed 20 mg/kg per dose of an oral suspension that contains 100 mg in 5 mL. What volume V do you give?

8 kg20 mg/kg100 mg/5 mL
V = mL
6.Hard
40 mg/1 mLV = ? mL

A patient weighs 165 lb. The prescription is 1 mg/kg as a single dose, and the stock contains 40 mg in 1 mL. Using 1 kg = 2.2 lb, what volume V do you give? Round to one decimal place.

165 lb1 mg/kg40 mg/1 mL1 kg = 2.2 lb
V = mL

Answer key

  1. 1. N = 60 tablets
  2. 2. n = 2 tablets
  3. 3. D = 135 mg
  4. 4. V = 0.8 mL
  5. 5. V = 8 mL
  6. 6. V = 1.9 mL

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