Pharmacy Technician Certification Exam Practice Question
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?
Correct Answer: C
Rationale: To determine the total initial dose of the drug, first convert the patient's weight from pounds to kilograms. Since 1 lb is approximately 0.4536 kg, a 185 lb patient weighs about 83.91 kg (185 lb × 0.4536 kg/lb).
Next, multiply the weight in kg by the dosage: 83.91 kg × 5 mg/kg = 419.55 mg, which rounds to 420 mg, making option C accurate.
Option A (81.4 mg) results from an incorrect conversion or calculation. Option B (185 mg) reflects a misunderstanding of the dosage per kg. Option D (925 mg) overestimates the dose, likely due to miscalculating the weight or dosage.
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