Ambien is a brand name for the medication zolpidem, which is mainly used to treat insomnia or sleep disorder. It belongs to the class of drugs known as sedative-hypnotics and works by affecting chemicals in the brain that may be unbalanced in people with sleep problems. Ambien is typically only recommended for short-term use and may cause side effects such as dizziness, headache, drowsiness, and memory loss. Take it properly and see the result after night.