Incidence and prevalence estimates vary slightly depending on the methodology, but commonly cited figures are that approximately one-third of Americans have symptoms of acute or intermittent insomnia, and that approximately 10% have chronic insomnia.…

There are currently three nonbenzodiazepine sedative-hypnotics available in the United States: zolpidem (Ambien, Stilnox), zaleplon (Sonata), and eszopiclone (Lunesta). All three display an identical mechanism of action by binding to the omega-1 receptor…