We get told that benzo's and z drugs negatively affect slow wave sleep but do they? I was just reading on Wiki about these drugs and found this In EEG studies, zopiclone significantly increases the energy of the beta frequency band and shows characteristics of high-voltage slow waves, desynchronization of hippocampal theta waves and an increase in the energy of the delta frequency band. Zopiclone increases both stage 2 and slow wave sleep (SWS), while zolpidem, an α1-selective compound, increases only SWS and causes no effect on stage 2 sleep. Zopiclone is less selective to the α1 site and has higher affinity to the α2 site than zaleplon. Zopiclone is therefore very similar pharmacologically to benzodiazepines. http://en.wikipedia.org/wiki/Zopiclone The sleep med nitrazepam which is a typical benzo is said to decrease slow wave sleep but has increases in stage 2 sleep. We are told we need slow wave sleep to get growth hormone secretion but in wiki is say this Both low dose (5 mg) and high dose (10 mg) of nitrazepam significantly increases growth hormone levels in humans. http://en.wikipedia.org/wiki/Nitrazepam What the, who is trying to pull the wool over our eyes. Might be a reason why i have found zolpiclone and zolpidem helpful and get better quality sleep then traditional benzo's. It would be interesting to find more research on this. cheers!!