If a person takes Ambien, the high will begin around 30 minutes later and last for several hours.

Although Ambien is classified as a sedative, this drug can give the user a rush of energy and euphoria when it is abused at high doses. However, misusing this drug can result in extreme drowsiness, confusion, and clumsiness, all of which increase the risk of falls, fractures, and other accidental injuries.
With all this side effect people are still taking it just to high.