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
0123455 mL

The prescription is 47.5 mg. The stock solution contains 25 mg in 1 mL. Draw up the dose in the syringe: what volume V do you give?

47.5 mg25 mg/1 mL
V = mL
2.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
3.Medium
024681010 mL

A child weighing 12 kg is prescribed 15 mg/kg of a drug. The stock solution contains 50 mg/mL. Draw up the dose: what volume V do you give?

12 kg15 mg/kg50 mg/mL
V = mL
4.Medium
2 g+ 9.2 mLV = ? mL

A vial contains 2 g of powder. The label says: add 9.2 mL of water for injection to give a total volume of 10 mL. The prescription is 240 mg. What volume V of the reconstituted solution do you give?

2 g+ 9.2 mL → 10 mL240 mg
V = mL
5.Hard
10%stockwater = ? mL

You must prepare 500 mL of a 2% (w/v) solution from a 10% (w/v) stock solution. How much water W must be added to the stock?

C₁ = 10%C₂ = 2%V₂ = 500 mL
W = mL
6.Hard
25k units1000 mL? mL/h1250 units/h

An infusion contains 25000 units of a drug in 1000 mL. The prescription is 1250 units per hour. At what rate R do you set the pump, in mL/h?

25000 units/1000 mL1250 units/h
R = mL/h

Answer key

  1. 1. V = 1.9 mL
  2. 2. n = 1 tablets
  3. 3. V = 3.6 mL
  4. 4. V = 1.2 mL
  5. 5. W = 400 mL
  6. 6. R = 50 mL/h

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