An adrenaline auto-injector (also known as an epinephrine auto-injector) is a portable medical device used to treat severe allergic reactions, including anaphylaxis. It delivers a single, pre-measured dose of epinephrine, which helps counteract the allergic reaction quickly.
How It Works:
- Epinephrine (Adrenaline): It works by:
- Relaxing airway muscles, making it easier to breathe.
- Narrowing blood vessels, which raises blood pressure.
- Reducing swelling and stopping the release of more allergic chemicals.
Common Brands:
- EpiPen
- Auvi-Q
- Emerade
- Anapen
When to Use:
- Signs of anaphylaxis appear, such as:
- Swelling of the lips, tongue, or throat.
- Difficulty breathing or wheezing.
- Severe hives or rash.
- Dizziness or fainting.
How to Use:
- Remove the safety cap (varies by brand but is usually brightly coloured).
- Hold the injector firmly with the tip pointing down.
- Press the tip firmly against the outer thigh (through clothing is okay).
- Hold in place for 5-10 seconds (or as instructed on the device).
- Remove and massage the injection site for 10 seconds.
- Call emergency services immediately, even if symptoms improve, as further treatment may be required.
Important Notes:
- Carry it at all times if you are at risk for anaphylaxis.
- Many devices come in adult and paediatric doses, so make sure you have the correct one.
- Always have a backup injector, as some reactions may require a second dose.
- Check the expiration date regularly, as epinephrine can lose effectiveness over time.
