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
? × 25 mg

A patient is prescribed 50 mg of a drug 3 times a day for 7 days. The tablets contain 25 mg each. How many tablets N are needed for the whole course?

50 mg3× per day7 days25 mg/tablet
N = tablets
2.Easy
0123455 mL

The prescription is 88 mg. The stock solution contains 200 mg in 5 mL. Draw up the dose in the syringe: what volume V do you give?

88 mg200 mg/5 mL
V = mL
3.Medium
90 kg25 mg/kg/day2× per dayD = ? mg

A patient weighs 90 kg. The prescribed dose is 25 mg/kg per day, given in 2 equal doses. How many milligrams D are given per dose?

90 kg25 mg/kg/day2× per day
D = mg
4.Medium
18 kg30 mg/kg/day2× per dayD = ? mg

A patient weighs 18 kg. The prescribed dose is 30 mg/kg per day, given in 2 equal doses. How many milligrams D are given per dose?

18 kg30 mg/kg/day2× per day
D = mg
5.Hard
25%stockV₁ = ? mL

You must prepare 200 mL of a 2.5% (w/v) solution from a 25% (w/v) stock solution. What volume of stock V₁ do you need?

C₁ = 25%C₂ = 2.5%V₂ = 200 mL
V₁ = mL
6.Hard
00.10.20.30.40.50.60.70.80.911 mL

The prescription is 2800 units of a drug that comes as 5000 units/mL. Draw up the dose in the 1 mL syringe: what volume V do you give?

2800 units5000 units/mL
V = mL

Answer key

  1. 1. N = 42 tablets
  2. 2. V = 2.2 mL
  3. 3. D = 1125 mg
  4. 4. D = 270 mg
  5. 5. V₁ = 20 mL
  6. 6. V = 0.56 mL

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