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
? × 100 mg

A patient is prescribed 250 mg of a drug. The tablets on the ward contain 100 mg each. How many tablets n do you give? The tablets are scored, so they can be broken in half.

250 mg100 mg/tablet
n = tablets
2.Easy
? × 20 mg

A patient is prescribed 10 mg of a drug 2 times a day for 5 days. The tablets contain 20 mg each. How many tablets N are needed for the whole course? The tablets are scored, so they can be broken in half.

10 mg2× per day5 days20 mg/tablet
N = tablets
3.Medium
20%50 mLm = ? mg

How many milligrams of drug m are in 50 mL of a 20% (w/v) solution?

20% w/v50 mL
m = mg
4.Medium
024681010 mL

A child weighing 17 kg is prescribed 4 mg/kg of a drug. The stock solution contains 20 mg/mL. Draw up the dose: what volume V do you give?

17 kg4 mg/kg20 mg/mL
V = mL
5.Hard
00.10.20.30.40.50.60.70.80.911 mL

The prescription is 0.8 mg. The ampoule contains 2000 micrograms per mL. Draw up the dose in the 1 mL syringe: what volume V do you give?

0.8 mg2000 mcg/mL
V = 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. n = 2.5 tablets
  2. 2. N = 5 tablets
  3. 3. m = 10000 mg
  4. 4. V = 3.4 mL
  5. 5. V = 0.4 mL
  6. 6. R = 50 mL/h

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