promethazine(redirected from Promethegan)
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(Pharmacology) an antihistamine drug used to treat allergies and to prevent vomiting, esp in motion sickness
[C20: from pro(pyl) + (di)meth(ylamine) + (phenothi)azine]
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|Noun||1.||promethazine - antihistamine (trade name Phenergan) used to treat allergies; also an antiemetic used to treat motion sickness|
antihistamine - a medicine used to treat allergies and hypersensitive reactions and colds; works by counteracting the effects of histamine on a receptor site