How many days will a prescription for 64 capsules last, if the directions read "ii caps q6h"?
5
8
12
15
8
Rationale: Since the directions say ii caps (two capsules) q6h (every six hours), and there are 24 hours in a day, this means that two capsules are taken at each dosing time, which occurs four times per day. Therefore, 2 x 4 = 8 capsules per day. Since the prescription was for 64 capsules, divide 64 by 8, to find that this prescription will last for 8 days.
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