Directions: Round dosage and weight to the nearest tenth as indicated. Use labels where provided.
Erythromycin ethylsuccinate 62.5 mg p.o. q6h is ordered for an infant weighing 10 lb 4 oz. The recommended safe dosage is 30 to 50 mg/kg/24 hr divided q6h.
a. What is the infant's weight in kilograms? _____
b. What is the safe 24-hr dosage range for this infant? _____
c. What is the divided dosage range? _____
d. Is the dosage ordered safe? (Prove mathematically.) _______________ Explain your action. ______________________________

Question

Quizplus · Accepted Answer

The Answer is a. 16 oz = 1 lb 4 oz = 0.25 lb = 0.3 lb
2 lb = 1 kg
10.3 lb ÷ 2.2 = 4.68 = 4.7 kg
b. 4.7 kg * 30 mg/kg/24hr = 141 mg/24 hr
4.7 kg * 50 mg/kg/24hr = 235 mg/24hr
The dosage range 141 to 235 mg/day.
c. 141 mg ÷ 4 = 35.25 = 35.3 mg q6h
235 mg ÷ 4 = 58.75 = 58.8 mg q6h
The divided dosage range is 35.3 to 58.8 mg q6h.
d. No. The dosage is 62.5 mg * 4 = 250 mg/day. It exceeds the safe dosage range of 141 to 235 mg/day. Notify the prescriber.

Directions: Round Dosage and Weight to the Nearest Tenth as Indicated