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 5 days. The tablets contain 20 mg each. How many tablets N are needed for the whole course?

20 mg3× per day5 days20 mg/tablet
N = tablets
2.Easy
0123455 mL

The prescription is 135 mg. The stock solution contains 100 mg in 2 mL. Draw up the dose in the syringe: what volume V do you give?

135 mg100 mg/2 mL
V = mL
3.Medium
20%5 mLm = ? mg

How many milligrams of drug m are in 5 mL of a 20% (w/v) solution?

20% w/v5 mL
m = mg
4.Medium
024681010 mL

A child weighing 28 kg is prescribed 2.5 mg/kg of a drug. The stock solution contains 25 mg/mL. Draw up the dose: what volume V do you give?

28 kg2.5 mg/kg25 mg/mL
V = mL
5.Hard
76 kg182 cmBSA = √(h·w/3600)75 mg/m²D = ? mg

A patient is 182 cm tall and weighs 76 kg. The prescription is 75 mg/m². Using the Mosteller formula BSA = √(height (cm) × weight (kg)/3600), find the dose D in mg.

182 cm76 kg75 mg/m²
D = mg
6.Hard
00.10.20.30.40.50.60.70.80.911 mL

The prescription is 470 units of a drug that comes as 1000 units/mL. Draw up the dose in the 1 mL syringe: what volume V do you give?

470 units1000 units/mL
V = mL

Answer key

  1. 1. N = 15 tablets
  2. 2. V = 2.7 mL
  3. 3. m = 1000 mg
  4. 4. V = 2.8 mL
  5. 5. D = 147 mg
  6. 6. V = 0.47 mL

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