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
? × 50 mg

A patient is prescribed 50 mg of a drug 4 times a day for 14 days. The tablets contain 50 mg each. How many tablets N are needed for the whole course?

50 mg4× per day14 days50 mg/tablet
N = tablets
2.Easy
0123455 mL

The prescription is 180 mg. The stock solution contains 40 mg in 1 mL. Draw up the dose in the syringe: what volume V do you give?

180 mg40 mg/1 mL
V = mL
3.Medium
18 kg10 mg/kg/day4× per dayD = ? mg

A patient weighs 18 kg. The prescribed dose is 10 mg/kg per day, given in 4 equal doses. How many milligrams D are given per dose?

18 kg10 mg/kg/day4× per day
D = mg
4.Medium
024681010 mL

A child weighing 36 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?

36 kg2 mg/kg10 mg/mL
V = mL
5.Hard
00.10.20.30.40.50.60.70.80.911 mL

The prescription is 490 units of a drug that comes as 1000 units/mL. Draw up the dose in the 1 mL syringe: what volume V do you give?

490 units1000 units/mL
V = mL
6.Hard
25%stockV₁ = ? mL

You must prepare 500 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 = 500 mL
V₁ = mL

Answer key

  1. 1. N = 56 tablets
  2. 2. V = 4.5 mL
  3. 3. D = 45 mg
  4. 4. V = 7.2 mL
  5. 5. V = 0.49 mL
  6. 6. V₁ = 20 mL

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