Wed March 07, 2012 By: Aditi Gupta

what are histamins and antihistamins

Expert Reply
Wed March 07, 2012

Histamine is a natural chemical produced by the body in response to foreign organisms.

A histamine antagonist (commonly called an antihistamine) is a pharmaceutical drug that inhibits the action of histamine by blocking it from attaching to histamine receptors; or it may inhibit the enzymatic activity of histidine decarboxylase, catalyzing the transformation of histidine into histamine (a typical antihistaminics).
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