Difficulty: Medium
Average Score: 64%
Simulated
Passage / Scenario
A toddler who weighs 33 lb.A nurse is preparing to administer amoxicillin 30 mg/kg/day in 2 equally divided doses every 12 hr to a toddler who weighs 33 lb. Available is amoxicillin 200 mg/5 mL suspension. How many mL should the nurse administer. (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)
Correct answer
A
Rationale
To calculate the dose of amoxicillin for the toddler, first convert the weight to kg (33 lb ├À 2.2 = 15 kg). Then, calculate the total daily dose (30 mg/kg/day x 15 kg = 450 mg/day). Since the dose is divided into 2 equal doses, each dose is 225 mg. Next, calculate the volume needed using the concentration of the suspension (200 mg/5 mL). Divide the dose by the concentration (225 mg ├À 200 mg/5 mL = 5.625 mL/day). Since the dose is given every 12 hours, divide the daily dose by 2 (5.625 mL ├À 2 = 2.8125 mL per dose). Round to the nearest tenth, the nurse should administer 5.6 mL. Other choices are incorrect as they do not align with the correct calculation.