The chemical Doxepin hydrochloride has a designated molecular formula of C19H22ClNO and a molecular weight of 315.841 g/mol. Synonyms may include: P-3693A, Adapin, Curatin, 11-(3-(Dimethylamino)propylidene)-6,11-dihydrodibenz(b,e)oxepin hydrochloride, N,N-Dimethyldibenz(b,e)oxepin-delta(sup 11(6H),gamma)-propylamine hydrochloride, Doxepin HCl, Doxepine hydrochloride, EINECS 214-966-8, MF 10 HCl, Novoxapin hydrochloride (ChemID). Doxepin hydrochloride has been assigned a MeSH pharmacological action of: Histamine Antagonist.