What is Anaphylaxis

Anaphylaxis is the medical term for a severe, potentially fatal, systemic allergic reaction that occurs suddenly after contact with an allergy causing substance. It is the most severe form of allergy and can be rapidly fatal if untreated. 

Like all allergy, anaphylaxis is caused by the immune system reacting against a substance that should normally be no threat, such as a food, a pollen or a medication. Unlike mild allergy, anaphylaxis causes the release of a flood of chemicals, including histamine,  that can cause your blood pressure to fall critically low – anaphylactic shock.

The airways can narrow and block breathing. Other symptoms usually include a weak rapid pulse, skin rashes, and nausea and vomiting. Anaphylaxis may require the administration of adrenaline to control the symptoms.