No preservatives, intended for one-time use are described by which term?

• A. Ampules
• B. Vials
• C. Multidose Vials
• D. Single-Dose Vials

Answer: (D)

The idea being tested is how medication containers are classified by their intended use and presence of preservatives. When a container is described as no preservatives and intended for one-time use, this is a single-dose vial. These vials are prepared for one patient and a single administration, and they typically do not contain preservatives because the contents will not be reused. Once the vial is punctured, any remaining liquid should be discarded to prevent contamination or dose errors.

This contrasts with multidose vials, which are designed for multiple entries and usually contain a preservative to maintain sterility between uses, requiring careful aseptic technique. Ampoules are also single-use containers but the term most commonly aligned with the no-preservative, one-time-use concept for vials is single-dose vial.