When anaphylaxis is suspected, what is the first action?

• A. Call 999.
• B. Check airway and breathing and start CPR if unconscious.
• C. Give adrenaline (intramuscular).
• D. Give oxygen.

Answer: (A)

The situation is a life-threatening emergency that can worsen in minutes, so the immediate priority is to summon professional help. Calling emergency services at once ensures that a rapid response, advanced airway management, monitoring, and adrenaline can be provided as soon as possible. This step starts the critical chain of care needed to prevent deterioration and potential cardiac or respiratory arrest.

While you wait for responders, you should assess the person’s airway and breathing and be ready to start CPR if they become unconscious. If you are trained and an adrenaline auto-injector is available, administer intramuscular adrenaline promptly after calling for help. Providing oxygen can also support breathing, but these actions are most effective when professional help is en route.