Side effects of Ambien Medicine are effective as far as the users are consuming them according to prescription.  The problems appear when the user is not following prescription Ambien (Zolpidem) is a hypnotic drug and with its use, the user must make sure that the risk of intoxication is always there. The user must only consume the quantity that is required. The user must make very sure that he/she must not drive the next day if he/she takes Ambien (Zolpidem) in the night.