Adrenaline is a naturally occurring hormone made in the adrenal glands. It is used as a drug to treat allergic reactions in such events as insect stings, medical drug reactions and hypersensitivity to certain foods, most commonly eggs and peanuts. The most serious form of allergy reaction is called anaphylaxis, where the bronchial tree tightens up, the blood pressure rises and the heart beats excessively fast.

Adrenaline needs to be given by injection and strengths of 1 part adrenaline to 1,000 or 10,000 parts of water are available through a doctor and should be kept in the house if anyone has had a strong reaction to anything at all in the past. Adrenaline is given by subcutaneous injection into any muscular part of the body and is very easy to administer.