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Pharmacological and Parenteral Therapies · Calculation · Take action

Acetaminophen 15 mg/kg PO is prescribed for a child who weighs 18 kg. The liquid is labeled 160 mg/5 mL. How many mL should the nurse give?

mL

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Answer: 8.4 mL

Dose: 15 mg × 18 kg = 270 mg. Volume: (270 ÷ 160) × 5 mL = 8.4375, rounded to 8.4 mL.

Source: Pickar. Dosage Calculations; AAP acetaminophen dosing

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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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