What is "methyprylon"

n. A piperidinedione sedative used for treating insomnia, now less commonly prescribed because of its side effects.

Methyprylon (Noludar) is a sedative of the piperidinedione derivative family developed by Hoffmann-La Roche. This medicine was used for treating insomnia, but is now rarely used as it has been replaced by newer drugs with fewer side effects, such as benzodiazepines. Methyprylon was withdrawn from the US market in June 1989 and the Canadian market in September 1990. Some other trade names are Noctan and Dimerin.