Zolpidem, commonly known by the brand name Ambien, is a medication primarily used to treat insomnia. It works by enhancing the effects of a neurotransmitter called gamma-aminobutyric acid (GABA) in the brain, promoting relaxation and sleep. While effective for short-term use, it can cause side effects such as dizziness, drowsiness, and potential dependence if used long-term. It's important to use zolpidem under the guidance of a healthcare professional.