Cyproheptadine hydrochloride sesquihydrate

Cyproheptadine hydrochloride sesquihydrate is the sesquihydrate form of cyproheptadine hydrochloride. The drug name cyproheptadine hydrochloride typically refers to this sesquihydrate. It is a sedating antihistamine with antimuscarinic and calcium-channel blocking properties, used for allergic conditions such as rhinitis, conjunctivitis, urticaria, angioedema, and pruritic skin disorders. Unlike other antihistamines, it also acts as a serotonin receptor antagonist, making it effective for vascular headaches and anorexia. It functions as a serotonergic antagonist, antipruritic drug, anti-allergic agent, gastrointestinal drug, and H1-receptor antagonist. It contains cyproheptadine hydrochloride (anhydrous).