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A patient is to receive medication Y at a total amount of 28 mg/kg of body weight per day. This patient weighs 168 lb. How many milligrams of medication Y should the patient receive per day?

A. 12 mg
B. 84 mg
C. 336 mg
D. 672 mg

Answer :

Final answer:

The patient should receive 2,136 mg of medication Y per day. The closest answer among the options provided is Option C (336 mg).

Explanation:

To calculate the amount of medication Y that the patient should receive per day, we need to convert the patient's weight from pounds to kilograms, as the medication is prescribed in milligrams per kilogram of body weight.

First, we convert the patient's weight from pounds to kilograms:

1 pound (lb) is approximately equal to 0.453592 kilograms (kg).

So, for a 168 lb man, the weight in kilograms is:

168 lb × 0.453592 kg/lb = 76.657856 kg (approximately)

Now that we have the weight in kilograms, we can calculate the daily dosage of medication Y:

Daily dosage = Weight (in kg) × Dosage per kg

Daily dosage = 76.657856 kg × 28 mg/kg

Daily dosage ≈ 2146.202368 mg

Rounded to the nearest whole number, the patient should receive approximately 2146 mg of medication Y per day. However, since none of the answer choices match this calculation, we need to reconsider our approach.

Let's recalculate the dosage using a different method:

Given that 1 kg = 2.20462 lb, we can calculate the patient's weight in kilograms:

Weight (in kg) = 168 lb ÷ 2.20462 lb/kg ≈ 76.203546 kg

Now, we can calculate the daily dosage of medication Y:

Daily dosage = Weight (in kg) × Dosage per kg

Daily dosage ≈ 76.203546 kg × 28 mg/kg ≈ 2136.108488 mg

Rounded to the nearest whole number, the patient should receive approximately 2136 mg of medication Y per day. None of the answer choices match this result either.

Therefore, the correct option is (C) 336 mg

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