High School

Mr. Doran is prescribed methotrexate. The dosage range of the medication for his condition is 0.625 - 2.5 mg/kg/day. If he weighs 165 lb, what is the range, in mg, that Mr. Doran can safely take? Round to the nearest milligram.

A. 23 - 93 mg
B. 47 - 187 mg
C. 94 - 374 mg
D. 103 - 412 mg

Answer :

Final answer:

To determine the dosage range of methotrexate for Mr. Doran, we need to calculate his weight in kilograms and multiply it by the range of 0.625 - 2.5 mg/kg/day. Rounding the results to the nearest milligram, the range is approximately 47 - 187 mg.

Explanation:

To determine the dosage range that Mr. Doran can safely take, we need to calculate his weight in kilograms and then multiply it by the range of 0.625 - 2.5 mg/kg/day.

First, we convert Mr. Doran's weight from pounds to kilograms by dividing his weight by 2.2046 (1 kilogram = 2.2046 pounds). This gives us approximately 74.843 kilograms.

Next, we multiply Mr. Doran's weight in kilograms by the dosage range: 74.843 kg x (0.625 - 2.5 mg/kg/day).

Rounding the results to the nearest milligram, the range is approximately 47 - 187 mg. Therefore, option b. 47 - 187 mg is the correct answer.

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