What type of container holds a single dose of medication and is sterile?

Ampoules are small, sealed vials that hold a single dose of medication, typically in liquid form. They are designed to be airtight and sterile, which protects the integrity of the medication inside. The glass or plastic construction of an ampoule allows for easy destruction of the seal by snapping the neck, enabling access to the sterile contents within without any contamination risk.

This makes ampoules particularly suitable for medications that require sterility, such as injectable medications, which must remain free from microbial contamination. The other options do not provide the same level of sterility or single-dose convenience as ampoules. Vials can hold multiple doses and may not remain sterile once opened, blister packs contain multiple individual doses but are not typically used for liquids, and pill bottles often hold capsules or tablets without guaranteeing sterility.