Ambien is a prescription medication primarily used to treat insomnia, helping individuals fall asleep faster and stay asleep longer. Its active ingredient, zolpidem, works by affecting certain chemicals in the brain that may be unbalanced in people with sleep problems. Typically taken just before bedtime, Ambien is available in various forms, including tablets and a sublingual spray. While it can be effective for short-term use, it is important to follow a doctor's guidance, as misuse can lead to dependence or other side effects.