What is "dacemazine"

n. A particular antihistamine drug derived from phenothiazine.

Dacemazine ( INN, also known as Ahistan and Histantine) is a phenothiazine derivative which acts as an histamine antagonist at the H subtype. First described in 1951, it was never marketed as a drug on its own, although a combination of dacemazine and di-tert-butylnaphthalenesulfonate was sold as an antispasmodic and antitussive under the trade name Codopectyl. It was also assessed as a possible anticancer drug.