Pharmacology and Intravenous Therapies Practice Test – Prep & Study Guide

To determine the correct dosage in capsules for Phenytoin, we start by interpreting the prescription details. The physician has prescribed 0.1 g of Phenytoin to be taken by mouth twice daily.

First, we need to convert 0.1 g to milligrams because the capsules are measured in mg. Since 1 g is equivalent to 1000 mg, 0.1 g is equal to 100 mg.

The capsules are 100 mg each. Therefore, for a single dose of 100 mg, the patient would need to take 1 capsule.

Since the prescription indicates a 100 mg dose, the correct answer indicates that 1 capsule should be prepared for each dose, aligning perfectly with the prescribed amount. When the physician recommends a course of treatment at that specific dose, it confirms the calculation of needing only one capsule per dose is indeed correct.