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 500 mg of a drug 2 times a day for 7 days. The tablets contain 250 mg each. How many tablets N are needed for the whole course?

500 mg2× per day7 days250 mg/tablet
N = tablets
2.Easy
? × 0.25 mg

The prescription is 500 micrograms (mcg) of a drug. The tablets contain 0.25 mg each. How many tablets n do you give?

500 mcg0.25 mg/tablet
n = tablets
3.Medium
90 kg10 mg/kgD = ? mg

A patient weighs 90 kg and is prescribed 10 mg/kg as a single dose. Find the dose D in mg.

90 kg10 mg/kg
D = mg
4.Medium
62 kgBSA = 1.46 m²75 mg/m²D = ? mg

A patient weighing 62 kg has a body surface area of 1.46 m². The prescription is 75 mg/m². Find the dose D in mg.

62 kgBSA = 1.46 m²75 mg/m²
D = mg
5.Hard
25%stockwater = ? mL

You must prepare 500 mL of a 2.5% (w/v) solution from a 25% (w/v) stock solution. How much water W must be added to the stock?

C₁ = 25%C₂ = 2.5%V₂ = 500 mL
W = mL
6.Hard
00.10.20.30.40.50.60.70.80.911 mL

The prescription is 0.4 mg. The ampoule contains 4000 micrograms per mL. Draw up the dose in the 1 mL syringe: what volume V do you give?

0.4 mg4000 mcg/mL
V = mL

Answer key

  1. 1. N = 28 tablets
  2. 2. n = 2 tablets
  3. 3. D = 900 mg
  4. 4. D = 109.5 mg
  5. 5. W = 450 mL
  6. 6. V = 0.1 mL

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