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The pharmacy receives a prescription for Keflex [tex]250 \, \text{mg} \, \text{q} \, 6 \, \text{h} \times 7 \, \text{days}[/tex]. How many [tex]250 \, \text{mg}[/tex] capsules are needed to fill the prescription?

A. 28
B. 48
C. 36
D. 42



Answer :

GinnyAnswer
To determine how many 250 mg capsules are needed to fill the prescription for Keflex, which is to be taken every 6 hours for 7 days, follow these steps:

1. Determine the number of doses per day: Since the medication is to be taken every 6 hours, we need to calculate how many doses are required in a single day. There are 24 hours in a day and the medication is taken every 6 hours, so:
[tex]\[ \frac{24 \, \text{hours}}{6 \, \text{hours/dose}} = 4 \, \text{doses/day} \][/tex]

2. Calculate the total number of doses over 7 days: Now, we need to find out how many doses will be taken over the entire 7-day period. We already know there are 4 doses per day, so for 7 days, we multiply:
[tex]\[ 4 \, \text{doses/day} \times 7 \, \text{days} = 28 \, \text{doses} \][/tex]

3. Determine the number of capsules required: Each dose requires one 250 mg capsule. Therefore, the total number of capsules required is equal to the total number of doses:
[tex]\[ 28 \, \text{doses} = 28 \, \text{capsules} \][/tex]

So, the number of 250 mg capsules needed to fill the prescription for Keflex is:

A. 28

Hence, the best answer is:
A. 28
ktreyb

Answer:

Option A, 28 capsules

Explanation:

The prescription for antibiotic medication cefalexin (brand name Keflex) is written to be taken every 6 hours (q6h) for 7 days.

There are 24 hours per day. Using this and the frequency at which 1 capsule is to be taken, it can be determined how many capsules the patient will need per day. Doing so requires simply dividing the amount of hours in the day by said frequency:

24 hrs per day / 1 capsule every 6hrs,             or             24 ÷ 6
= 4 capsules daily

The patient is prescribed 4 capsules per day.

Now, multiply the amount of capsules per day by the duration of the prescription.
4 capsules per day × 7 days,             or             4 × 7
= 28 capsules

The pharmacy should fill the prescription for 28 capsules of 250mg Keflex.  

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