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 0.5% w/v. You need 3 mg of the drug. Draw up the volume in the syringe: what volume V is that?

0.5% w/v3 mg

V = mL

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 10 mL?

1:10 00010 mL

m = mg

3.Medium

A solution has a ratio strength of 1:1000. You need 0.89 mg. Draw up the volume in the 1 mL syringe: what volume V is that?

1:10000.89 mg

V = mL

4.Medium

Practice exercise (made-up values, not clinical guidance). A vial contains ampicillin 500 mg as a powder. The practice label says to add 1.8 mL of sterile water; the powder adds 0.2 mL to the volume. What is the concentration C in mg/mL after reconstitution?

500 mg1.8 mL+0.2 mL

C = mg/mL

5.Hard

Practice exercise (made-up values, not clinical guidance). You must prepare 500 mL of 13% sodium chloride by mixing 23% and 3% sodium chloride. How many mL V of the 3% solution do you need? Round to the nearest whole mL.

23%3%13%500 mL

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 50% solution do you need? Round to the nearest whole mL.

50%10%30%400 mL

V = mL

Answer key

1. V = 0.6 mL
2. m = 1 mg
3. V = 0.89 mL
4. C = 250 mg/mL
5. V = 250 mL
6. V = 200 mL

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