promethazine promeritor • prometheus · · · Info · Definitions · Synonyms · Characters · · promethazine · · Text Latin · · Script 12 · · Length 4 · · Syllables Definitions · · · (noun) antihistamine (trade name Phenergan) used to treat allergies; also an antiemetic used to treat motion sickness. Synonyms: Phenergan. · · Noun Definition 1 Synonyms · · · phenergan · · Synonym 1 Characters · · a latin small letter a U+0061 e latin small letter e U+0065 h latin small letter h U+0068 i latin small letter i U+0069 m latin small letter m U+006D 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 z latin small letter z U+007A