Which of the following forms is NOT used for parenteral administration of medications?

The correct answer relates to the fact that multidose ampules are not a recognized form of parenteral medication delivery. In pharmacology, parenteral administration refers to the delivery of medications by injection, bypassing the gastrointestinal tract.

Prefilled syringes, ampules, and multidose vials are commonly used methods for administering medications parenterally. Prefilled syringes come preloaded with a specific medication dose, making them convenient for quick administration. Ampules are sealed containers that hold a single dose of medication and are broken to access the contents for injection. Multidose vials contain multiple doses of a medication, allowing healthcare providers to draw out multiple doses as needed.

In contrast, multidose ampules are essentially a contradiction in terms. Ampules are designed for single use; once opened, any remaining contents cannot be reused due to the risk of contamination. This limitation is precisely why multidose ampules are not a standard form for parenteral administration.