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
? × 20 mg

A patient is prescribed 20 mg of a drug 3 times a day for 10 days. The tablets contain 20 mg each. How many tablets N are needed for the whole course?

20 mg3× per day10 days20 mg/tablet
N = tablets
2.Easy
0123455 mL

The prescription is 102.5 mg. The stock solution contains 25 mg in 1 mL. Draw up the dose in the syringe: what volume V do you give?

102.5 mg25 mg/1 mL
V = mL
3.Medium
500 mg+ 1.8 mLV = ? mL

A vial contains 500 mg of powder. The label says: add 1.8 mL of water for injection to give a total volume of 2 mL. The prescription is 100 mg. What volume V of the reconstituted solution do you give?

500 mg+ 1.8 mL → 2 mL100 mg
V = mL
4.Medium
73 kgBSA = 1.59 m²50 mg/m²D = ? mg

A patient weighing 73 kg has a body surface area of 1.59 m². The prescription is 50 mg/m². Find the dose D in mg.

73 kgBSA = 1.59 m²50 mg/m²
D = mg
5.Hard
00.10.20.30.40.50.60.70.80.911 mL

The prescription is 0.44 mg. The ampoule contains 1000 micrograms per mL. Draw up the dose in the 1 mL syringe: what volume V do you give?

0.44 mg1000 mcg/mL
V = mL
6.Hard
39 kg116 cmBSA = √(h·w/3600)175 mg/m²D = ? mg

A patient is 116 cm tall and weighs 39 kg. The prescription is 175 mg/m². Using the Mosteller formula BSA = √(height (cm) × weight (kg)/3600), find the dose D in mg.

116 cm39 kg175 mg/m²
D = mg

Answer key

  1. 1. N = 30 tablets
  2. 2. V = 4.1 mL
  3. 3. V = 0.4 mL
  4. 4. D = 79.5 mg
  5. 5. V = 0.44 mL
  6. 6. D = 196.2 mg

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