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 5% w/v. You need 160 mg of the drug. Draw up the volume in the syringe: what volume V is that?

5% w/v160 mg
V = mL
2.Easy
0123455 mL

A solution is 5% w/v. You need 220 mg of the drug. Draw up the volume in the syringe: what volume V is that?

5% w/v220 mg
V = mL
3.Medium
024681010 mL

A solution has a ratio strength of 1:10 000. You need 0.28 mg. Draw up the volume in the 10 mL syringe: what volume V is that?

1:10 0000.28 mg
V = mL
4.Medium
00.10.20.30.40.50.60.70.80.911 mL

A solution has a ratio strength of 1:1000. You need 0.94 mg. Draw up the volume in the 1 mL syringe: what volume V is that?

1:10000.94 mg
V = mL
5.Hard
70%dextrose+10%dextrose? mL40%500 mL

Practice exercise (made-up values, not clinical guidance). You must prepare 500 mL of 40% dextrose by mixing 70% and 10% dextrose. How many mL V of the 10% solution do you need? Round to the nearest whole mL.

70%10%40%500 mL
V = mL
6.Hard
2.5%30 g+0.5%hydrocortisone? g1%hydrocortisone

Practice exercise (made-up values, not clinical guidance). You have 30 g of 2.5% hydrocortisone ointment. How many grams m of 0.5% hydrocortisone ointment must you add to make a 1% ointment? Round to the nearest whole gram.

30 g · 2.5%0.5%1%
m = g

Answer key

  1. 1. V = 3.2 mL
  2. 2. V = 4.4 mL
  3. 3. V = 2.8 mL
  4. 4. V = 0.94 mL
  5. 5. V = 250 mL
  6. 6. m = 90 g

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