Erythromycin is given to a six-year-old child before dental work to prevent endocarditis. The child weighs 44 lb (20 kg). The order is for 20 mg/kg by mouth two hours before the dental appointment. The bottle comes concentrated as 400 mg/5 ml. How many milliliters should the child receive? Record your answer using a whole number.

5 milliliters

Explanation:

Weight of the child = 20 kg

Prescription order = 20 mg/kg 2 hours before appointment

The total amount of erythromycin required by the child= weight of the child x prescription order.

                       = 20 x 20 = 400 mg

Amount of erythromycin per 5 ml of the bottle = 400 mg

Hence, the total milliliters of the liquid that the child should receive = 5 ml

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