Anaphylaxis is a medical emergency that requires immediate medical assistance and treatment.
Anaphylaxis is a severe and potentially life-threatening reaction to a trigger, such as an allergy.
Symptoms of anaphylaxis include feeling faint, finding it hard to breathe, a fast heartbeat and feeling anxious.
Anaphylaxis needs to be treated in hospital at soon as possible. Use an adrenaline injector if the person has one and call 999 for an ambulance.
Anaphylaxis is usually caused by an allergic reaction. Common triggers include foods, medicines and insect stings.
You can help prevent anaphylaxis by avoiding any triggers you have and carrying your adrenaline injector at all times.
Page last reviewed: 02/12/2016
Next review due: 02/12/2019