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

A solution is 1% w/v. You need 17 mg of the drug. Draw up the volume in the syringe: what volume V is that?

1% w/v17 mg

V = mL

2.Easy

Practice exercise (made-up values, not clinical guidance). How many mg of bupivacaine are in 10 mL of 0.5% w/v solution? Find m.

0.5% w/v10 mL

m = mg

3.Medium

A solution has a ratio strength of 1:1000. You need 0.22 mg. Draw up the volume in the 1 mL syringe: what volume V is that?

1:10000.22 mg

V = mL

4.Medium

Practice exercise (made-up values, not clinical guidance). A vial contains oxacillin 2000 mg as a powder. The practice label says to add 11.5 mL of sterile water; the powder adds 1 mL to the volume. The prescribed dose is 1600 mg. What volume V do you draw up? Round to one decimal place.

2000 mg11.5 mL+1 mL1600 mg

V = mL

5.Hard

A vial holds 250 mg of powder. You add 3.4 mL of diluent, and the powder adds 0.6 mL of volume. The prescription is 137.5 mg. Draw up the dose: what volume V do you give?

250 mg3.4 mL + 0.6 mL137.5 mg

V = mL

6.Hard

Practice exercise (made-up values, not clinical guidance). You must prepare 400 mL of 30% dextrose by mixing 50% and 10% dextrose. How many mL V of the 10% solution do you need? Round to the nearest whole mL.

50%10%30%400 mL

V = mL

Answer key

1. V = 1.7 mL
2. m = 50 mg
3. V = 0.22 mL
4. V = 10 mL
5. V = 2.2 mL
6. V = 200 mL

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