Anaphylaxis and adrenaline auto-injectors a comprehensive guide Anaphylaxis is an extremely severe allergic reaction. Reactions usually begin within minutes and progress rapidly, however, they can occur up to 2-3 hours after exposure. Exercise can also initiate symptoms a while after exposure to an allergen. Common allergens include food and insect stings. In the UK, 5–8% […]
Anaphylaxis and adrenaline auto-injectors






