Pharmacy calculations worksheet with answers

Practice exercise (made-up values, not clinical guidance). How many g of sodium chloride are in 1000 mL of 0.9% w/v solution? Find m.

Practice exercise (made-up values, not clinical guidance). Express the ratio strength 1:250 as a percentage strength p (% w/v).

A solution has a ratio strength of 1:1000. You need 0.57 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 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. What is the concentration C in mg/mL after reconstitution?

Practice exercise (made-up values, not clinical guidance). You have 200 g of 5% coal tar ointment. How many grams m of 1% coal tar ointment must you add to make a 2% ointment? Round to the nearest whole gram.

A vial holds 2000 mg of powder. You add 4.6 mL of diluent, and the powder adds 0.4 mL of volume. The prescription is 1240 mg. Draw up the dose: what volume V do you give?