Which of the following is an all-glass container that holds a single dose of an injectable medication?

The correct answer is an ampule, which is specifically designed as an all-glass container that securely holds a single dose of injectable medication. Ampules are typically sealed by melting the glass at the neck, ensuring the sterility and integrity of the medication inside until it is ready to be used. When healthcare professionals need to use the medication, they break the neck of the ampule to access the drug inside.

This design is particularly useful for medications that are sensitive to contamination or require a specific dose that is not intended for multiple uses. The single-dose nature of ampules ensures that each dose is fresh and sterile, which is critical in medical settings.

The other options, such as vials and syringes, serve different purposes. Vials are multi-use containers often made of glass or plastic, designed to hold multiple doses of medication, unlike ampules. Disposable syringes are tools for delivering the medication but do not contain the medication themselves. A term like “Vacoliter” is not a standard term associated with injecting medications and does not accurately describe a type of container for injectable medicines. Thus, the ampule is the most accurate choice in this context.