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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1.Easy
epinephrine1:10 0003 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 3 mL?

1:10 0003 mL
m = mg
2.Easy
dextrose50 g1000 mL? % w/v

Practice exercise (made-up values, not clinical guidance). 50 g of dextrose is dissolved in water to a total volume of 1000 mL. What is the percentage strength p (% w/v)?

50 g1000 mL
p = %
3.Medium
024681010 mL

A solution has a ratio strength of 1:10 000. You need 0.46 mg. Draw up the volume in the 10 mL syringe: what volume V is that?

1:10 0000.46 mg
V = mL
4.Medium
024681010 mL

A solution has a ratio strength of 1:10 000. You need 0.5 mg. Draw up the volume in the 10 mL syringe: what volume V is that?

1:10 0000.5 mg
V = mL
5.Hard
20%150 g+0%base? g10%zinc oxide

Practice exercise (made-up values, not clinical guidance). You have 150 g of 20% zinc oxide ointment. How many grams m of plain ointment base (0%) must you add to make a 10% ointment? Round to the nearest whole gram.

150 g · 20%0%10%
m = g
6.Hard
50%dextrose+10%dextrose? mL20%100 mL

Practice exercise (made-up values, not clinical guidance). You must prepare 100 mL of 20% 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%20%100 mL
V = mL

Answer key

  1. 1. m = 0.3 mg
  2. 2. p = 5 %
  3. 3. V = 4.6 mL
  4. 4. V = 5 mL
  5. 5. m = 150 g
  6. 6. V = 75 mL

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