Question

question 10 (2.5 points)
a patient is prescribed keflex 0.5 g by mouth twice a day for 7 days. how many capsules should be provided for the entire week if each table contains 500 mg/capsule?

○ 7 capsules

○ 14 capsules

○ 21 capsules

○ 28 capsules

Explanation:

Step1: Convert grams to milligrams

Since \(1\space g = 1000\space mg\), then \(0.5\space g=0.5\times1000 = 500\space mg\).

Step2: Calculate daily capsules

The patient takes \(0.5\space g\) (which is \(500\space mg\)) twice a day. Each capsule is \(500\space mg\), so daily capsules \(=\frac{500\space mg\times2}{500\space mg/capsule}= 2\) capsules per day.

Step3: Calculate weekly capsules

For 7 days, total capsules \(=2\space capsules/day\times7\space days = 14\) capsules? Wait, no, wait. Wait, 0.5g twice a day: 0.5g per dose, two doses a day. Each capsule is 500mg = 0.5g. So per dose, 1 capsule. Twice a day: 2 capsules per day. For 7 days: 27 =14? Wait, no, wait the options have 14? Wait no, wait 0.5g twice a day: 0.5g 2 =1g per day. Each capsule is 500mg=0.5g. So 1g /0.5g per capsule = 2 capsules per day. 27=14. Wait but wait, maybe I made a mistake. Wait 0.5g per dose, twice a day: so per day, 0.52=1g. Each capsule is 500mg=0.5g. So number of capsules per day is 1g / 0.5g per capsule = 2. For 7 days: 27=14. But wait the options have 14? Wait no, the options are 7,14,21,28. Wait maybe I miscalculated. Wait 0.5g per dose, twice a day: so each day, 2 doses, each dose 1 capsule (since 0.5g per capsule). So 2 capsules per day. 7 days: 27=14. So the answer is 14? Wait but wait, let's check again. 0.5g = 500mg. So each dose is 500mg, which is 1 capsule. Twice a day: 2 capsules. For 7 days: 27=14. So the correct answer is 14 capsules. Wait but wait, maybe the question was 0.5g three times a day? No, the question says twice a day. So 27=14. So the answer is 14.

Answer:

14 capsules (corresponding to the option "14 capsules")