The initial dosage of a drug is 5 mg/kg of body weight. If a patient weighs 185 lb, what is the total initial dose, in mg?

Rationale

The total initial dose, in mg, is 420.

To calculate the total initial dose, you first need to convert the patient's weight from pounds to kilograms by dividing by 2.2 (since 1 kg is approximately 2.2 pounds). Once you have the weight in kilograms, you can multiply it by the initial dosage of 5 mg/kg to find the total initial dose in milligrams.

A (81.4) YOUR ANSWER

This value is incorrect because it does not account for the correct conversion from pounds to kilograms and the subsequent multiplication by the initial dosage.

B (185) YOUR ANSWER

This choice is the patient's weight in pounds and does not reflect the correct calculation for determining the total initial dose in milligrams.

C (420) CORRECT

This is the correct answer. By converting the patient's weight to kilograms (185 lb ÷ 2.2 ≈ 84.1 kg) and multiplying by the initial dosage of 5 mg/kg, you get a total initial dose of 420 mg.

D (925) YOUR ANSWER

This value is significantly higher than the correct total initial dose of 420 mg, indicating an incorrect calculation or misunderstanding of the dosage instructions.

Conclusion

The total initial dose of a drug, in this case, is correctly determined by converting the patient's weight from pounds to kilograms and then multiplying by the specified dosage of 5 mg/kg. By following this calculation method, the total initial dose is accurately found to be 420 mg, ensuring the patient receives the appropriate amount of medication based on their body weight.

The initial dosage of a drug is 5 mg/kg of body weight. If a patient weighs 185 lb, what is the total initial dose, in mg?

The total initial dose, in mg, is 420.

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