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
0123455 mL

The prescription is 200 mg. The stock solution contains 50 mg in 1 mL. Draw up the dose in the syringe: what volume V do you give?

200 mg50 mg/1 mL
V = mL
2.Easy
? × 100 mg

A patient is prescribed 100 mg of a drug 4 times a day for 7 days. The tablets contain 100 mg each. How many tablets N are needed for the whole course?

100 mg4× per day7 days100 mg/tablet
N = tablets
3.Medium
024681010 mL

A child weighing 12 kg is prescribed 2 mg/kg of a drug. The stock solution contains 10 mg/mL. Draw up the dose: what volume V do you give?

12 kg2 mg/kg10 mg/mL
V = mL
4.Medium
88 kgBSA = 1.78 m²135 mg/m²D = ? mg

A patient weighing 88 kg has a body surface area of 1.78 m². The prescription is 135 mg/m². Find the dose D in mg.

88 kgBSA = 1.78 m²135 mg/m²
D = mg
5.Hard
28 kg133 cmBSA = √(h·w/3600)25 mg/m²D = ? mg

A patient is 133 cm tall and weighs 28 kg. The prescription is 25 mg/m². Using the Mosteller formula BSA = √(height (cm) × weight (kg)/3600), find the dose D in mg.

133 cm28 kg25 mg/m²
D = mg
6.Hard
20%stockwater = ? mL

You must prepare 250 mL of a 5% (w/v) solution from a 20% (w/v) stock solution. How much water W must be added to the stock?

C₁ = 20%C₂ = 5%V₂ = 250 mL
W = mL

Answer key

  1. 1. V = 4 mL
  2. 2. N = 28 tablets
  3. 3. V = 2.4 mL
  4. 4. D = 240.3 mg
  5. 5. D = 25.43 mg
  6. 6. W = 187.5 mL

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