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Pharmacological and Parenteral Therapies · Calculation · Take action

Amoxicillin 40 mg/kg/day is prescribed, divided every 8 hours, for a child who weighs 15 kg. How many mg should the nurse give per dose?

mg

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Answer: 200 mg

Daily dose: 40 mg × 15 kg = 600 mg/day. Divided every 8 hours (3 doses): 600 ÷ 3 = 200 mg per dose.

Source: Pickar. Dosage Calculations (pediatric divided doses)

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Study tip
  • Learn high-alert drugs by their hold parameters and antidotes: digoxin, warfarin (vitamin K), heparin (protamine), opioids (naloxone), insulin, potassium.
  • Do 10 dosage calculations a day: tablets, liquids, mL/hr, gtt/min, mg/kg, and units/hr. Convert units first, round last.

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