An infant who weighs 22 lb receives a prescription for amoxicillin 20 mg/kg/day PO in divided doses every 8 hours. The bottle is labeled, "Amoxicillin for Oral Suspension, USP 250 mg per 5 mL." How many mL should the nurse administer with each dose? (Enter numerical value only. If rounding is necessary, round to the nearest tenth.)

Rationale: Convert the infant's weight from pounds (lb) to kilograms (kg). Weight in kg = 22 lb / 2.2 lb/kg = 10 kg. Calculate the total daily desired dose in milligrams (mg). Total daily desired dose (mg) = Desired dose (mg/kg/day) × Weight (kg) = 20 mg/kg/day × 10 kg = 200 mg/day. Determine the number of doses per day. Doses are given every 8 hours, so Number of doses per day = 24 hours / 8 hours/dose = 3 doses/day. Calculate the dose per administration in milligrams (mg). Dose per administration (mg) = Total daily desired dose (mg) / Number of doses per day = 200 mg / 3 doses = 66.666 mg. Available concentration of the medication = 250 mg / 5 mL. Calculate the volume in milliliters (mL) to administer per dose. Volume (mL) = Desired dose per administration (mg) / (Available concentration (mg) / Available volume (mL)) = 66.666 mg / (250 mg / 5 mL) = 66.666 mg / 50 mg/mL = 1.333 mL. Round the answer to the nearest tenth. = 1.3