Open all pages about Anaphylaxis
Symptoms of anaphylaxis start quickly and include a swollen throat and tongue, difficulty breathing or swallowing, wheezing, confusion or dizziness.
If you think you or someone you're with is having an anaphylactic reaction, call 999, lie down and use an adrenaline auto-injector if you have one.
Treatment for anaphylaxis in hospital includes adrenaline given by an injection or drip in your vein, oxygen, and fluids given by a drip in your vein.
You can help prevent or prepare for anaphylaxis by avoiding what you're allergic to and carrying 2 adrenaline auto-injectors with you at all times.
Anaphylaxis happens when your body has a serious reaction to something you're allergic to, such as a food, medicine or insect sting.
Anaphylaxis is a life-threatening allergic reaction that happens very quickly. Call 999 immediately if you think you or someone else has anaphylaxis.
Page last reviewed: 21/06/2023
Next review due: 21/06/2026