Upon consumption, Restoril stays in your system for approximately eight hours. However, when Restoril detoxification is administered, Restoril can be removed from the system within a short period. Even when Restoril leaves your system, the side effects can still impair your health and well-being for some time. This is why many individuals come to experience short term side effects associated with Restoril use. Likewise, when Restoril is abused over a longer period, long term side effects arise due to the impact Restoril has on the brain.