Do nonbenzodiazepine z drugs like lunesta (eszopiclone) and ambien disrupt sleep architecture?

Yes-with chronic use: Good question. The "z drugs" disrupt sleep less than benzodiazepines but there is evidence that there is some disruption with chronic use that becomes a big problem when people try to stop taking these drugs. See http://www.Mylwi.Com/ehealth-newsletter/why-you-shouldnt-confuse-ambien-use-with-sleep/ & http://weeksmd.Com/2013/04/sleeping-pills-and-death/ & http://bit.Ly/17uogmu for details.

Yes: There are side effects with all sleep medications, including above. There are also issues with memory loss and sleep walking and sweating and more. Melatonin is otc and probably safer, best to check with a certified sleep doc. It is exciting that the smart phones will be able to monitor sleep much better in the future. Then you will get an answer. Meanwhile, an ambulatory sleep monitor will do.

It would be best to discuss this with your Psychiatrist. If you are not confident with your Doctor see another for a second opinion. It's good to have a physical exam to rule out illness. Sleep is very important for physical and mental health. You may need a sleep study to determine why you can't sleep. Also consult with a Clinical Psychologist with expertise in multiple types of psychotherapy.