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
? × 10 mg

A patient is prescribed 10 mg of a drug 3 times a day for 7 days. The tablets contain 10 mg each. How many tablets N are needed for the whole course?

10 mg3× per day7 days10 mg/tablet
N = tablets
2.Easy
0123455 mL

The prescription is 40 mg. The stock solution contains 25 mg in 1 mL. Draw up the dose in the syringe: what volume V do you give?

40 mg25 mg/1 mL
V = mL
3.Medium
1%w/vV = ? mL

A dose of 25 mg is needed from a 1% (w/v) solution. What volume V contains this dose?

25 mg1% w/v
V = mL
4.Medium
2%w/vV = ? mL

A dose of 200 mg is needed from a 2% (w/v) solution. What volume V contains this dose?

200 mg2% w/v
V = mL
5.Hard
73 kg157 cmBSA = √(h·w/3600)135 mg/m²D = ? mg

A patient is 157 cm tall and weighs 73 kg. The prescription is 135 mg/m². Using the Mosteller formula BSA = √(height (cm) × weight (kg)/3600), find the dose D in mg.

157 cm73 kg135 mg/m²
D = mg
6.Hard
25%stockV₁ = ? mL

You must prepare 250 mL of a 1% (w/v) solution from a 25% (w/v) stock solution. What volume of stock V₁ do you need?

C₁ = 25%C₂ = 1%V₂ = 250 mL
V₁ = mL

Answer key

  1. 1. N = 21 tablets
  2. 2. V = 1.6 mL
  3. 3. V = 2.5 mL
  4. 4. V = 10 mL
  5. 5. D = 240.9 mg
  6. 6. V₁ = 10 mL

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