methylatedghosts
Can't brain. Has dumb.
I had a brief skim through it when you provided it before, and I've skimmed through it again now.
And personally... I don't really trust a science site which has "mind and spirit" as one of the tabs up at the top of the page. Forgive the comparison, but it makes it look like some kind of Hippy site.
Also check out the research papers which is just below health and medicinal.
Mind and spirit for many people is a big part of drug usage. For some it's the reason for taking them. (esp. the psychidelic/hallucinogenic types - e.g. Ayahuasca)
I've found it to be a very good website for any research on drug usage and effects of them. I've known people to decide on whether or not to use a certain substance after reading the information on that particular website - all the information is there and easy to access.