If a prescription reads: Aspirin 5gr, dispense 100 tablets, what is the dose in milligrams?

To determine the dosage in milligrams from the prescription indicating Aspirin 5 grains, it's essential to understand the conversion between grains and milligrams.

One grain is equivalent to approximately 64.8 milligrams. Therefore, to convert 5 grains to milligrams, you would perform the following calculation:

5 grains × 64.8 mg/grain = 324 mg.

When rounding to the nearest whole number, this value can be approximated to 325 mg. This aligns with the choice indicating 325 as the milligram dosage for Aspirin.

This calculation is straightforward and highlights the importance of being comfortable with conversion factors in pharmacy, allowing for accurate medication dosing and patient safety.