Ambien is marketed under the brand name Zolpidem. It is used to treat sleep disorders, and you can easily Buy Ambien Online from our online pharmacy. Zolpidem is a sedative-hypnotic medication. It works in your brain to produce chemicals that have a calming effect on your brain and nerves. Ambien is used to treat insomnia; it helps you fall and stay asleep faster. Ambien's ER formula has two layers. The first layer dissolves quickly, allowing you to fall asleep quickly; the second layer dissolves slowly, allowing you to sleep for longer periods.