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diphenhydramine

A first generation antihistamine and ethanolamine with sedative and anti-allergic properties. Diphenhydramine competitively inhibits the histamine-1 (H1) receptor, thereby alleviating the symptoms caused by endogenous histamine on bronchial, capillary and gastrointestinal smooth muscles. This prevents histamine-induced bronchoconstriction, vasodilation, increased capillary permeability, and GI smooth muscle spasms.
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Synonym:Probedryl
Rigidyl
US brand name:Syntedril
Code name:FAR 90X2
PM 255
S51
Chemical structure:2-(diphenylmethoxy)-N,N-dimethylethylamine
O-benzhydryldimethylaminoethanol
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