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Antihistamines

Antihistamine medicines block the action of the chemical histamine during an allergic reaction to an irritant (allergen). Allergic symptoms, such as sneezing and itching, are not as bad when an antihistamine is taken.

Last Revised: April 6, 2011

Author: Healthwise Staff

Medical Review: Kathleen Romito, MD - Family Medicine & Anne C. Poinier, MD - Internal Medicine & Alexander H. Murray, MD, FRCPC - Dermatology

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