Pharmacy calculations worksheet with answers

Free printable Pharmacy 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

Practice exercise (made-up values, not clinical guidance). Express the ratio strength 1:200 as a percentage strength p (% w/v).

1:200

p = %

2.Easy

Practice exercise (made-up values, not clinical guidance). A solution of epinephrine has a ratio strength of 1:10 000. How many milligrams m are in 5 mL?

1:10 0005 mL

m = mg

3.Medium

Practice exercise (made-up values, not clinical guidance). A vial contains ampicillin 1000 mg as a powder. The practice label says to add 3.5 mL of sterile water; the powder adds 0.5 mL to the volume. The prescribed dose is 400 mg. What volume V do you draw up? Round to one decimal place.

1000 mg3.5 mL+0.5 mL400 mg

V = mL

4.Medium

A solution has a ratio strength of 1:1000. You need 0.9 mg. Draw up the volume in the 1 mL syringe: what volume V is that?

1:10000.9 mg

V = mL

5.Hard

A vial holds 2000 mg of powder. You add 9.8 mL of diluent, and the powder adds 0.2 mL of volume. The prescription is 440 mg. Draw up the dose: what volume V do you give?

2000 mg9.8 mL + 0.2 mL440 mg

V = mL

6.Hard

A vial holds 250 mg of powder. You add 9.6 mL of diluent, and the powder adds 0.4 mL of volume. The prescription is 25 mg. Draw up the dose: what volume V do you give?

250 mg9.6 mL + 0.4 mL25 mg

V = mL

Answer key

1. p = 0.5 %
2. m = 0.5 mg
3. V = 1.6 mL
4. V = 0.9 mL
5. V = 2.2 mL
6. V = 1 mL

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