An autoinyector is a medical device designed to deliver a specific dose of medication through a simple injection. It is often used for emergency situations, such as administering epinephrine during an allergic reaction. The device is user-friendly, allowing individuals to self-administer the medication without needing extensive training. Typically, an autoinyector consists of a spring-loaded mechanism that automatically injects the medication when pressed against the skin. This feature makes it particularly useful for people with conditions like anaphylaxis or diabetes, who may need quick access to their medication in critical moments.