Final answer:
The patient takes 75 mg each dose.
Step-by-step explanation:
To determine how many mg of the pain reliever is taken by the patient each dose, you need to divide the total daily dose by the number of doses. In this case, the patient is taking 300 mg total per day in four equal doses. To find how many mg is taken each dose, divide 300 mg by 4. Therefore, the patient takes 75 mg by each dose.