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 1% w/v. You need 6 mg of the drug. Draw up the volume in the syringe: what volume V is that?

1% w/v6 mg
V = mL
2.Easy
epinephrine1:10 0005 mL? mg

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
024681010 mL

A solution has a ratio strength of 1:10 000. You need 0.26 mg. Draw up the volume in the 10 mL syringe: what volume V is that?

1:10 0000.26 mg
V = mL
4.Medium
oxacillin 2 gAdd 11.5 mL sterile water.Powder volume: 1 mL.500 mg → ? mL

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 500 mg. What volume V do you draw up? Round to one decimal place.

2000 mg11.5 mL+1 mL500 mg
V = mL
5.Hard
23%sodium chloride? mL+3%sodium chloride8%600 mL

Practice exercise (made-up values, not clinical guidance). You must prepare 600 mL of 8% sodium chloride by mixing 23% and 3% sodium chloride. How many mL V of the 23% solution do you need? Round to the nearest whole mL.

23%3%8%600 mL
V = mL
6.Hard
0123455 mL

A vial holds 250 mg of powder. You add 4.4 mL of diluent, and the powder adds 0.6 mL of volume. The prescription is 140 mg. Draw up the dose: what volume V do you give?

250 mg4.4 mL + 0.6 mL140 mg
V = mL

Answer key

  1. 1. V = 0.6 mL
  2. 2. m = 0.5 mg
  3. 3. V = 2.6 mL
  4. 4. V = 3.1 mL
  5. 5. V = 150 mL
  6. 6. V = 2.8 mL

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