Antihistamines prevent histamine causing the itching and swelling that occurs when you have allergies. They have been used for many years in the treatment of hay fever, other nasal allergies and skin conditions such as urticaria and eczema. 

The older types of antihistamines are now used less often as they can cause drowsiness. We will usually recommend the newer type of antihistamines, which are very safe to take and non-sedating. Most are available to buy over the counter at any chemist; although some are available by prescription only. 

Anaphylaxis is a serious allergic reaction that can be life-threatening or fatal.

People with hay fever (rhinitis) have inflamed lining in their nose, which causes it to be blocked, running and itchy, as well as causing sneezing.

Urticaria is a condition which involves the development of itchy wheals (hives) on the skin.

Around 5–10% of people who have a problem with a drug are suffering from a drug allergy, possibly one prescribed by their GP or as part of an investigation in hospital. 

Many people experience reactions to foods but food allergy is only the cause in a small number of reactions.  

The Trust offers a wide range of allergy services for adults of all ages. This includes specialist services for patients with difficult to manage allergies.

Allergy team contact information


Fulham wing/South block, Fulham Road

Tel: 020 7351 8892
Fax: 020 7351 8949