Anaphylaxis (severe allergic reaction)
Life-threateningDanger
Identify and remove the allergen if still present (sting, food being eaten).
Response — first 60 seconds
- 01
Recognise: known exposure plus rapid onset of airway swelling, difficulty breathing, hives, or signs of shock.
- 02
Call 112 immediately — say 'anaphylaxis'.
- 03
Help the casualty use their own auto-injector (EpiPen / Jext): jab firmly into the outer mid-thigh, hold 3 seconds, massage briefly.
- 04
Lay the casualty flat with legs raised. If breathing is easier sitting up, support them in that position.
- 05
If no improvement in 5 minutes and a second auto-injector is available, give it.
- 06
Monitor airway and breathing continuously. Prepare for CPR if they deteriorate.
- 07
Even after improvement, the casualty must go to hospital — biphasic reactions occur.
Skills required
Worth remembering
Adrenaline via auto-injector is the only first-aid intervention that reverses anaphylaxis. Antihistamines and inhalers are not substitutes.



