Ambien is a brand name for the medication zolpidem, which is a sedative-hypnotic primarily used to treat insomnia. It helps individuals fall asleep faster and stay asleep throughout the night.

Ambien works by enhancing the activity of a neurotransmitter in the brain called gamma-aminobutyric acid (GABA). GABA helps to calm brain activity and promotes sleep. By increasing GABA levels, Ambien produces a sedating effect, helping to initiate and maintain sleep.