Pharmacy calculations worksheet with answers

Practice exercise (made-up values, not clinical guidance). How many g of sodium chloride are in 500 mL of 0.9% w/v solution? Find m.

A solution is 2% w/v. You need 88 mg of the drug. Draw up the volume in the syringe: what volume V is that?

A solution has a ratio strength of 1:1000. You need 0.84 mg. Draw up the volume in the 1 mL syringe: what volume V is that?

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?

Practice exercise (made-up values, not clinical guidance). You must prepare 900 mL of 10% hydrogen peroxide from a 30% stock and purified water. How many mL V of water do you need? Round to the nearest whole mL.

A vial holds 2000 mg of powder. You add 1.5 mL of diluent, and the powder adds 0.5 mL of volume. The prescription is 700 mg. Draw up the dose: what volume V do you give?