How is anaphylaxis treated?

Anaphylaxis is a rapid, severe allergic reaction that can affect breathing, blood pressure, skin, and digestion. If an adrenaline auto-injector is available, it should be used promptly according to its instructions, then emergency services should be contacted. Medical teams may give further adrenaline, oxygen, fluids, or medicines for specific symptoms. Antihistamines do not replace adrenaline when breathing or circulation is affected. People are monitored because symptoms can return after they first improve.

Call emergency services immediately for facial swelling, difficulty swallowing, wheezing, breathing difficulty, collapse, or symptoms affecting more than one body system after a possible allergen. Use the prescribed auto-injector into the outer thigh if indicated. Lie down with legs raised unless breathing is easier sitting up; avoid standing or walking. A second dose may be needed if symptoms persist and the device instructions or emergency professionals advise it. Arrange follow-up for identifying triggers and an emergency action plan.

Every suspected anaphylactic reaction needs emergency assessment, even if the person improves after adrenaline. Do not drive yourself. Urgent help is especially important when the trigger may be a food, medicine, or insect sting and symptoms are progressing quickly. Later review may include allergy testing and advice on carrying prescribed emergency medicine.

Ask what triggered the reaction, how to use the auto-injector, whether you need more than one device, which allergens to avoid, and when allergy testing is appropriate. Ask for a written emergency plan and advice for family, school, or workplace contacts.