Pharmacy Technician Certification Exam Practice Questions Practice Question
The dose of a certain antibiotic is 5 mg/kg of body weight. How much of the drug,in mg,is needed for a patient weighing 145 lb?
Correct Answer: B
Rationale: To determine the appropriate antibiotic dosage, first convert the patient's weight from pounds to kilograms. Since 1 lb is approximately 0.4536 kg, a patient weighing 145 lb equals about 65.77 kg (145 x 0.4536).
Next, calculate the required dosage: 5 mg/kg x 65.77 kg equals approximately 328.85 mg. Rounding to the nearest whole number gives 329 mg, which aligns closely with option B (330 mg).
Option A (319 mg) is too low and does not meet the dosage requirement. Option C (659 mg) and option D (725 mg) significantly exceed the calculated dose, potentially leading to overdose. Thus, option B is the most accurate choice.
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