Pharmacy Technician Certification Board Practice Exam Practice Question
A physician prescribes 5 mg of a drug per kg of body weight twice daily for a patient weighing 110 lb. How many 0.5 g tablets of the drug are required for a 10-day duration?
Correct Answer: C
Rationale: To determine the total number of tablets required, first convert the patient's weight from pounds to kilograms: 110 lb ÷ 2.2 = 50 kg. The prescribed dosage is 5 mg/kg, so for 50 kg, the daily dose is 5 mg × 50 kg = 250 mg. Since the drug is taken twice daily, the total daily dose is 250 mg × 2 = 500 mg. Over 10 days, the total dosage becomes 500 mg × 10 = 5000 mg or 5 g. Each tablet is 0.5 g, so the number of tablets needed is 5 g ÷ 0.5 g/tablet = 10 tablets.
Options A (5) and B (10) underestimate the total requirement, while D (40) overestimates it.
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