Which container type is a glass, hermetically sealed container designed for a single dose?

• A. Vials
• B. Ampules
• C. Self-Contained Systems
• D. Single-Dose Vials

Answer: (B)

Think about how sterile injectable meds are kept isolated until use. Ampoules are glass containers that are hermetically sealed at the factory, and they’re designed for a single dose. The entire contents stay sterile inside until you break off the neck and withdraw the dose. Once opened, there’s no way to reseal it safely, so any unused medication is discarded, making them truly single-use.

Vials, by contrast, use a stopper and cap and are commonly suitable for multiple withdrawals; they can be glass or plastic and aren’t sealed in the same hermetic way after the stopper is punctured. Self-contained systems are a broader category of ready-to-use devices and aren’t the classic glass hermetically sealed single-dose containers. Single-dose vials exist but aren’t defined by a hermetic glass seal like ampoules.