For a client prescribed 500 mg of cephalexin every 6 hours for 10 days, how many days will 24 tablets of 250 mg each last?

To determine how many days the prescribed amount of cephalexin will last, it’s essential to first calculate the total daily dosage required based on the prescription. The client is prescribed 500 mg of cephalexin every 6 hours. In a 24-hour period, there are four 6-hour intervals. Therefore, the total daily dosage can be calculated as follows:

500 mg per dose multiplied by 4 doses per day equals 2000 mg per day.

Next, since the client has 24 tablets of 250 mg, we find the total amount of medication available:

24 tablets multiplied by 250 mg per tablet equals 6000 mg.

To determine how many days this total amount of medication will last, divide the total amount available by the daily requirement:

6000 mg divided by 2000 mg per day equals 3 days.

Thus, 24 tablets of 250 mg each will last for 3 days, making this the correct answer.