Which statement is true regarding single-dose vials?

Single-dose vials are specifically designed to contain a single administration of a medication, with no preservatives included. This lack of preservatives is critical for maintaining sterility and ensuring that the medication is as safe and effective as possible for patient use. Once a single-dose vial has been entered (needle punctured), it is recommended that any remaining contents be discarded immediately rather than reused, primarily to prevent contamination and infection.

In contrast, multiple-dose vials are formulated with preservatives to allow for repeated use over a designated period. Because single-dose vials do not contain these preservatives, they should not be stored for reuse after initial opening, which is reflected in the context of your choices regarding reuse timeframes.