One of the most often prescribed drugs for insomnia in the United States is Ambien (zolpidem), which provides momentary relief from trouble sleeping or staying asleep. Known as a sedative-hypnotic, Ambien helps people get a good night's sleep by amplifying the effects of GABA, a naturally occurring neurotransmitter in the brain. Even if it works well, there is a chance of reliance and negative consequences, such as sleepwalking and memory problems, therefore medical professionals must closely manage its use.