sleep aids

Does anybody know whether or not the info on this Wikipedia page is legit? In particular, the 'hypothetical' effects on the brain. I'm especially interested in the results of peer-reviewed studies. I do have a lot of trouble sleeping (getting to sleep and staying asleep). So far, only sleeping...

This packaging about sums it up...

http://www.cbc.ca/health/story/2007/04/19/estazolam-health.html I guess this is their attempt at making sure the sleeping pills work regardless of how that batch of herbs turned out.