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
0123455 mL

A solution is 2% w/v. You need 66 mg of the drug. Draw up the volume in the syringe: what volume V is that?

2% w/v66 mg
V = mL
2.Easy
epinephrine1:1 0000.5 mL? mg

Practice exercise (made-up values, not clinical guidance). A solution of epinephrine has a ratio strength of 1:1 000. How many milligrams m are in 0.5 mL?

1:1 0000.5 mL
m = mg
3.Medium
024681010 mL

A solution has a ratio strength of 1:10 000. You need 0.42 mg. Draw up the volume in the 10 mL syringe: what volume V is that?

1:10 0000.42 mg
V = mL
4.Medium
024681010 mL

A solution has a ratio strength of 1:10 000. You need 0.64 mg. Draw up the volume in the 10 mL syringe: what volume V is that?

1:10 0000.64 mg
V = mL
5.Hard
0123455 mL

A vial holds 500 mg of powder. You add 9.8 mL of diluent, and the powder adds 0.2 mL of volume. The prescription is 170 mg. Draw up the dose: what volume V do you give?

500 mg9.8 mL + 0.2 mL170 mg
V = mL
6.Hard
2.5%50 g+0.5%hydrocortisone? g1.5%hydrocortisone

Practice exercise (made-up values, not clinical guidance). You have 50 g of 2.5% hydrocortisone ointment. How many grams m of 0.5% hydrocortisone ointment must you add to make a 1.5% ointment? Round to the nearest whole gram.

50 g · 2.5%0.5%1.5%
m = g

Answer key

  1. 1. V = 3.3 mL
  2. 2. m = 0.5 mg
  3. 3. V = 4.2 mL
  4. 4. V = 6.4 mL
  5. 5. V = 3.4 mL
  6. 6. m = 50 g

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