シプロヘプタジンMeanings1nouncyproheptadine; Periactinpharmacology›A first-generation antihistamine with antiserotonergic properties, used for allergies and sometimes as an appetite stimulant. The brand name Periactin is a trademark.シプロヘプタジンは抗こうヒスタミン薬やくの一いっ種しゅです。Cyproheptadine is a type of antihistamine.