Difficulty: Medium
Average Score: 67%
Simulated
A nurse is preparing to administer cephalexin 50 mg/kg/day in divided doses every 8 hours to a child who weighs 33 lb. The amount available is cephalexin oral suspension 250 mg/5 mL. How many mL should the nurse administer per dose? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)
Correct answer
A
Rationale
Convert 33 lb to 15 kg (33 ├â┬À 2.2). Total daily dose: 50 mg/kg/day ├âÔÇö 15 kg = 750 mg/day. Per dose: 750 mg ├â┬À 3 = 250 mg. Volume: 250 mg ├â┬À (250 mg/5 mL) = 5 mL.