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. The tablets on the ward contain 20 mg each. How many tablets n do you give?

20 mg20 mg/tablet
n = tablets
2.Easy
0123455 mL

The prescription is 55 mg. The stock solution contains 250 mg in 5 mL. Draw up the dose in the syringe: what volume V do you give?

55 mg250 mg/5 mL
V = mL
3.Medium
45 kg25 mg/kg/day3× per dayD = ? mg

A patient weighs 45 kg. The prescribed dose is 25 mg/kg per day, given in 3 equal doses. How many milligrams D are given per dose?

45 kg25 mg/kg/day3× per day
D = mg
4.Medium
45 kg7.5 mg/kg/day3× per dayD = ? mg

A patient weighs 45 kg. The prescribed dose is 7.5 mg/kg per day, given in 3 equal doses. How many milligrams D are given per dose?

45 kg7.5 mg/kg/day3× per day
D = mg
5.Hard
00.10.20.30.40.50.60.70.80.911 mL

The prescription is 0.52 mg. The ampoule contains 4000 micrograms per mL. Draw up the dose in the 1 mL syringe: what volume V do you give?

0.52 mg4000 mcg/mL
V = mL
6.Hard
10%stockwater = ? mL

You must prepare 100 mL of a 1% (w/v) solution from a 10% (w/v) stock solution. How much water W must be added to the stock?

C₁ = 10%C₂ = 1%V₂ = 100 mL
W = mL

Answer key

  1. 1. n = 1 tablets
  2. 2. V = 1.1 mL
  3. 3. D = 375 mg
  4. 4. D = 112.5 mg
  5. 5. V = 0.13 mL
  6. 6. W = 90 mL

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