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
? × 250 mg

A patient is prescribed 375 mg of a drug. The tablets on the ward contain 250 mg each. How many tablets n do you give? The tablets are scored, so they can be broken in half.

375 mg250 mg/tablet
n = tablets
2.Easy
125 mg/5 mLV = ? mL

The prescription is 150 mg. The stock solution contains 125 mg in 5 mL. What volume V do you draw up?

150 mg125 mg/5 mL
V = mL
3.Medium
90 kg5 mg/kgD = ? mg

A patient weighs 90 kg and is prescribed 5 mg/kg as a single dose. Find the dose D in mg.

90 kg5 mg/kg
D = mg
4.Medium
024681010 mL

A child weighing 23 kg is prescribed 10 mg/kg of a drug. The stock solution contains 50 mg/mL. Draw up the dose: what volume V do you give?

23 kg10 mg/kg50 mg/mL
V = mL
5.Hard
125 mg/5 mLV = ? mL

A patient weighs 169.4 lb. The prescription is 0.5 mg/kg as a single dose, and the stock contains 125 mg in 5 mL. Using 1 kg = 2.2 lb, what volume V do you give? Round to one decimal place.

169.4 lb0.5 mg/kg125 mg/5 mL1 kg = 2.2 lb
V = mL
6.Hard
39 kg152 cmBSA = √(h·w/3600)250 mg/m²D = ? mg

A patient is 152 cm tall and weighs 39 kg. The prescription is 250 mg/m². Using the Mosteller formula BSA = √(height (cm) × weight (kg)/3600), find the dose D in mg.

152 cm39 kg250 mg/m²
D = mg

Answer key

  1. 1. n = 1.5 tablets
  2. 2. V = 6 mL
  3. 3. D = 450 mg
  4. 4. V = 4.6 mL
  5. 5. V = 1.5 mL
  6. 6. D = 320.8 mg

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