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A total of 546 mg of cephalexin is prescribed for a 49.0 lb patient each day. Calculate the amount per dose if administered in four doses throughout the day.

a) 36 mg
b) 91.2 mg
c) 136.5 mg
d) 182 mg

Answer :

Final answer:

To calculate the amount per dose of cephalexin for a 49.0 lb. patient each day, you need to convert the weight to kilograms and divide the total mg dosage by the number of doses.

Explanation:

To calculate the amount per dose, we need to convert the patient's weight from pounds to kilograms.

49.0 lb. is equal to 22.23 kg.

Then, we divide the total mg dosage of cephalexin (546 mg) by the number of doses (4) to find the amount per dose.

546 mg / 4 = 136.5 mg

Therefore, the amount per dose at each of the four doses throughout the day is 136.5 mg (option c).

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