Ambien CR (generic: zolpidem) is a prescription medicine used in adults for the short-term treatment of insomnia (difficulty falling asleep or staying asleep).

Ambien CR belongs to a group of drugs called hypnotics.  It works by slowing down brain activity so you can fall asleep.

Ambien CR comes in tablet form and is taken by mouth just before bedtime.

Common side effects of Ambien CR include daytime drowsiness, dizziness, and headache. Do not drive or operate heavy machinery until you know how Ambien CR affects you.