If a nurse is preparing to administer ranitidine 300 mg with available dosage of 150 mg per tablet, how many tablets are needed?

To determine the number of tablets needed to administer a total dose of 300 mg of ranitidine, you can use a straightforward calculation based on the available dosage per tablet, which is 150 mg.

When the nurse has a prescription for 300 mg, and each tablet contains 150 mg, you divide the total required dosage by the dosage per tablet:

300 mg (required dose) ÷ 150 mg (per tablet) = 2 tablets.

This calculation shows that to achieve the prescribed dosage of 300 mg, two tablets of 150 mg each are necessary. Therefore, the answer indicating that two tablets are needed is correct, as it accurately reflects the requirements based on the available medication formulation.