4. A nurse is preparing to administer magnesium gluconate 270 mg PO. Avail-
able is magnesium gluconate liquid 54 mg/5 mL. How many mL should the
nurse administer?
Answer 270 mg x 5ml/54 mg = 25 mL
5. A nurse is preparing to administer lamivudine 150 mg PO every 12 hr.
Available is lamivudine oral solution 10 mg/mL. How many mL should the
nurse administer per dose?
Answer 150 mg x 1 ml/10 mg = 15 mL
6. A nurse is preparing to administer ethosuximide 750 mg PO daily. Available is
ethosuximide syrup 250 mg/tsp. How many mL should the nurse adminis- ter?
Answer 750 mg x 1 tsp/250 mg = 3 tsp x 4.928 mL / 1 tsp = 14.78 = 15 mL
7. A nurse is preparing to administer acetaminophen 325 mg PO every 6 hr.
Available is acetaminophen oral suspension 160 mg/5 mL. How many mL
should the nurse administer per dose?
Answer 325 mg x 5 mL/160 mg = 10.15 = 10 mL
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