Ambien (zolpidem) is a sedative, also called a hypnotic. Zolpidem affects chemicals in the brain that may be unbalanced in people with sleep problems insomnia).

Ambien is used to treat insomnia. The immediate-release tablet is used to help you when you first go to bed. The extended-release form, Ambien CR, which has a first layer that dissolves quickly to help you fall asleep, and a second layer that dissolves slowly to help you stay asleep.
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