Ambien, the brand name for zolpidem, is a prescription medication primarily used to treat insomnia. Classified as a sedative-hypnotic, Ambien works by slowing brain activity to help users fall asleep more easily. It is typically prescribed for short-term use, usually 7 to 10 days, due to its potential for dependence and tolerance.Ambien comes in two main forms: immediate-release (to help users fall asleep quickly) and extended-release (Ambien CR), which also helps maintain sleep throughout the night. Patients are usually advised to take Ambien just before bedtime, on an empty stomach, and only when they can devote a full night (7–8 hours) to sleep.