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
? × 10 mg

A patient is prescribed 10 mg of a drug 4 times a day for 7 days. The tablets contain 10 mg each. How many tablets N are needed for the whole course?

10 mg4× per day7 days10 mg/tablet
N = tablets
2.Easy
? × 25 mcg

The prescription is 0.075 mg of a drug. The tablets contain 25 micrograms (mcg) each. How many tablets n do you give?

0.075 mg25 mcg/tablet
n = tablets
3.Medium
0.5%20 mLm = ? mg

How many milligrams of drug m are in 20 mL of a 0.5% (w/v) solution?

0.5% w/v20 mL
m = mg
4.Medium
46 kgBSA = 1.27 m²100 mg/m²D = ? mg

A patient weighing 46 kg has a body surface area of 1.27 m². The prescription is 100 mg/m². Find the dose D in mg.

46 kgBSA = 1.27 m²100 mg/m²
D = mg
5.Hard
200 mg/5 mLV = ? mL

A child weighing 10 kg is prescribed 5 mg/kg per dose of an oral suspension that contains 200 mg in 5 mL. What volume V do you give? Round to one decimal place.

10 kg5 mg/kg200 mg/5 mL
V = mL
6.Hard
25%stockV₁ = ? mL

You must prepare 250 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 = 250 mL
V₁ = mL

Answer key

  1. 1. N = 28 tablets
  2. 2. n = 3 tablets
  3. 3. m = 100 mg
  4. 4. D = 127 mg
  5. 5. V = 1.3 mL
  6. 6. V₁ = 25 mL

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