Pharmacy Technician Certification Board Practice Exam Practice Question
How much menthol is required to compound a formula reading: 'camphor 0.3%, menthol 0.25%, hydrocortisone 1%, Aquaphor q.s. ad 600 g'?
Correct Answer: C
Rationale: To determine the amount of menthol needed for a 600 g formula at 0.25%, calculate 0.25% of 600 g, which is 1.5 g or 1500 mg.
Option A (15 mg) is incorrect as it underestimates the required amount significantly. Option B (150 mg) also falls short, as it does not account for the full percentage needed for the formula. Option D (15 g) overestimates the required menthol, as it exceeds the calculated amount. Thus, 1500 mg accurately reflects the specified concentration in the formula.
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