A prescription calls for 2 mg of a medication. The available tablets are 0.5 mg each. How many tablets are required?

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Study for the Archer Pharmacology Test to master dosage calculations and medication administration. Use flashcards and multiple choice questions with detailed explanations. Get ready for your exam!

Multiple Choice

A prescription calls for 2 mg of a medication. The available tablets are 0.5 mg each. How many tablets are required?

Explanation:
Calculating how many tablets are needed by dividing the prescribed dose by the strength of one tablet. With a 2 mg prescription and tablets that are 0.5 mg each, you do 2 mg ÷ 0.5 mg per tablet = 4 tablets. Verifying: 4 tablets × 0.5 mg = 2 mg, which matches the prescribed dose. So four tablets are required. If the math didn’t come out evenly, you’d need to consider rounding rules or a different dosage form.

Calculating how many tablets are needed by dividing the prescribed dose by the strength of one tablet. With a 2 mg prescription and tablets that are 0.5 mg each, you do 2 mg ÷ 0.5 mg per tablet = 4 tablets. Verifying: 4 tablets × 0.5 mg = 2 mg, which matches the prescribed dose. So four tablets are required. If the math didn’t come out evenly, you’d need to consider rounding rules or a different dosage form.

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