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 12.5 mg of a drug 4 times a day for 14 days. The tablets contain 25 mg each. How many tablets N are needed for the whole course? The tablets are scored, so they can be broken in half.

12.5 mg4× per day14 days25 mg/tablet
N = tablets
2.Easy
? × 12.5 mg

A patient is prescribed 18.75 mg of a drug. The tablets on the ward contain 12.5 mg each. How many tablets n do you give? The tablets are scored, so they can be broken in half.

18.75 mg12.5 mg/tablet
n = tablets
3.Medium
80 kg10 mg/kg/day3× per dayD = ? mg

A patient weighs 80 kg. The prescribed dose is 10 mg/kg per day, given in 3 equal doses. How many milligrams D are given per dose?

80 kg10 mg/kg/day3× per day
D = mg
4.Medium
1 g+ 9.6 mLV = ? mL

A vial contains 1 g of powder. The label says: add 9.6 mL of water for injection to give a total volume of 10 mL. The prescription is 60 mg. What volume V of the reconstituted solution do you give?

1 g+ 9.6 mL → 10 mL60 mg
V = mL
5.Hard
00.10.20.30.40.50.60.70.80.911 mL

The prescription is 0.36 mg. The ampoule contains 2000 micrograms per mL. Draw up the dose in the 1 mL syringe: what volume V do you give?

0.36 mg2000 mcg/mL
V = mL
6.Hard
10%stockV₁ = ? mL

You must prepare 250 mL of a 0.5% (w/v) solution from a 10% (w/v) stock solution. What volume of stock V₁ do you need?

C₁ = 10%C₂ = 0.5%V₂ = 250 mL
V₁ = mL

Answer key

  1. 1. N = 28 tablets
  2. 2. n = 1.5 tablets
  3. 3. D = 266.7 mg
  4. 4. V = 0.6 mL
  5. 5. V = 0.18 mL
  6. 6. V₁ = 12.5 mL

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