Ambien is a sedative drug; buy Ambien online, one of the most popular sleep medications. It affects chemicals in the brain that may be unbalanced in people with sleep problems. It is used to treat insomnia; therefore, the immediate-release tablet is used to help you fall asleep when a person first goes to bed. People who take Ambien stay awake; however, a person will feel a chemically induced buzz that feels a lot like the popular benzodiazepine drug Xanax.