Methapyrilene
Template:Short description Script error: No such module "Hatnote". Template:Drugbox Methapyrilene is an antihistamine and anticholinergic of the pyridine chemical class which was developed in the early 1950s. It was sold under the trade names Co-Pyronil and Histadyl EC in the UK.[1] It has relatively strong sedative effects, to the extent that its primary use was as a medication for insomnia rather than for its antihistamine action. Together with scopolamine, it was the main ingredient in Sominex, Nytol, and Sleep-Eze. It also provided the sedative component of Excedrin PM.[2] All of these products were reformulated in the late 1970s[3] when methapyrilene was demonstrated to cause liver cancer in rats when given chronically.[4]
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