Answer :
Approximately, 1/3 of a teaspoon for each dose. Because, 1/2 oz is equal to 1 tablespoon, which is equal to 3 teaspoons.
The order is to take the medication four times a day, so the total amount of antacid to be taken each day is:
4 x 1/2 oz = 2 oz, or 6 tablespoons, or 18 teaspoons.
Since the patient only has a teaspoon available, they should take 1/3 of a teaspoon for each dose :
(18 teaspoons / 4 doses per day = 4.5 teaspoons per dose;
4.5 teaspoons / 3 = 1.5 teaspoons per dose, or approximately 1/3 teaspoon).
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