Prescribed Tegretol is 0.25 g. Given that each tablet is 100 mg, how many tablets should be taken?

To determine the number of tablets required for a prescription of Tegretol at 0.25 g, it’s important to convert the units so they are consistent.

The prescribed dosage is 0.25 g, which can be converted to milligrams since each tablet's dosage is given in mg. There are 1000 mg in a gram, so 0.25 g is equivalent to 250 mg (0.25 g × 1000 mg/g = 250 mg).

Each tablet of Tegretol contains 100 mg. To find out how many tablets are needed for a total of 250 mg, you would divide the total milligrams prescribed by the milligrams per tablet:

250 mg ÷ 100 mg/tablet = 2.5 tablets.

This calculation shows that a total of 2.5 tablets are needed to meet the prescribed dosage of 0.25 g. Thus, the correct answer is that the patient should take 2.5 tablets.