doxepin doxazosin • doxepin hydrochloride · · · Info · Definitions · Synonyms · Characters · · doxepin · · Text Latin · · Script 7 · · Length 3 · · Syllables Definitions · · · (noun) a tricyclic antidepressant (trade names Adapin and Sinequan) with numerous side effects (dry mouth and sedation and gastrointestinal disturbances). Synonyms: doxepin hydrochloride, Adapin, Sinequan. · · Noun Definition 1 Synonyms · · · doxepin hydrochloride · · Synonym 1 adapin · · Synonym 2 sinequan · · Synonym 3 Characters · · d latin small letter d U+0064 e latin small letter e U+0065 i latin small letter i U+0069 n latin small letter n U+006E o latin small letter o U+006F p latin small letter p U+0070 x latin small letter x U+0078