Methyprylon - meth-i-PRYE-lon is using to treat insomnia - trouble in sleeping. However, it has generally been replaced by other medication for the treat of insomnia. If methyprylon is using regularly - for example, every day to help produce sleep, it may not be effective for more than 1 week.
Note:This drug was withdrawn from the USA market in June 1965 and the Canadian market in September 1990.