If you are calculating in tablets, always round to the nearest 1/2 tablet. When you are calculating IV’ rates, round to the nearest whole number. Perform rounding only the end of the calculation.


1) Ordered: Atropine 0.6 mg IM. Label reads 0.3 mg per 0.5 mL. How many milliliters will you give per dose?

a. 1mL

b. 2mL

c. 0.25mL

d. 0.5mL

2) 0.5 g of cefazolin is ordered. The label reads 125 mg/mL. The nurse should give:

a. 2 mL.

b. 4 mL.

c. 1 mL.

d. 3 mL.

3) The nurse is providing ondansetron (Zofran) 4 mg as an intravenous injection. The pharmacy provides ondansetron in 8 mg/2 mL vials. How much medication will the nurse draw up? Provide ______ mL.