Ambien (zolpidem) is a prescription medication used to treat insomnia. It helps individuals fall asleep faster and stay asleep longer. It belongs to a class of drugs known as sedative-hypnotics and works by affecting chemicals in the brain that may be unbalanced in people with sleep disorders. Ambien is typically used for short-term treatment due to its potential for dependence and side effects, which can include dizziness, drowsiness, and confusion. It's important to follow medical advice to avoid misuse or adverse reactions.