Can anaphylaxis be prevented?

Anaphylaxis is a rapid, severe allergic reaction that can affect breathing, circulation or several parts of the body. Common triggers include foods, medicines and insect stings. A person with food allergy may need careful label checking and a clear plan for accidental exposure. Previous mild reactions do not reliably predict the next reaction, so a clinician should assess suspected allergy.

Learn the trigger and tell family, friends, school or workplace contacts. Read ingredient labels every time and ask about cross-contact when eating away from home. Keep prescribed adrenaline devices available, check their expiry and learn the exact technique. Wear medical identification if advised. Discuss vaccines, medicines or procedures with clinicians when a previous reaction involved healthcare. Do not test a suspected trigger yourself.

Use prescribed adrenaline immediately for symptoms suggesting anaphylaxis, such as throat or tongue swelling, breathing difficulty, wheezing, faintness or widespread symptoms after exposure. Call emergency services, state that anaphylaxis is suspected, and follow the dispatcher’s instructions. Do not wait to see whether symptoms settle. Anyone recovering from a suspected reaction needs urgent medical assessment because symptoms can return.

What trigger is most likely, and do I need allergy testing? Should I carry adrenaline, and can you check my technique? What should people around me do in an emergency?