cyproheptadine Cypris • Cypro-phoenician · · · Info · Definitions · Synonyms · Characters · · cyproheptadine · · Text Latin · · Script 14 · · Length 5 · · Syllables Definitions · · · (noun) an antihistamine (trade name Periactin) used to treat some allergic reactions. Synonyms: Periactin. · · Noun Definition 1 Synonyms · · · periactin · · Synonym 1 Characters · · a latin small letter a U+0061 c latin small letter c U+0063 d latin small letter d U+0064 e latin small letter e U+0065 h latin small letter h U+0068 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 r latin small letter r U+0072 t latin small letter t U+0074 y latin small letter y U+0079