プロメタジンMeanings1nounpromethazinepharmacologyA first-generation antihistamine used for allergies, motion sickness, nausea, and as a sedative. Domain-specific pharmacological term.プロメタジンは抗こうヒスタミン薬やくの一いっ種しゅです。Promethazine is a type of antihistamine.