Active Ingredient History

  • Now
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. 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. Manufacturers voluntarily withdrew methapyrilineb drug products from the market in May and June 1979, when methapyrilene was demonstrated to cause liver cancer in rats when given chronically.   NCATS

More Chemistry
1612 | 2-[[2-(dimethylamino)ethyl]-2-thenylamino]pyridine | metapyrilene | methapyrilene | methapyrilene hcl | methapyrilene hydrochloride | methypyrilene | n,n-dimethyl-n'-pyrid-2-yl-n'-2-thenylethylenediamine | paradormalene | pyrinistab | pyrinistol | thenylene | thenylene hcl | thenylpyramine | thenylpyramine hcl


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