http://en.wikipedia.org/wiki/RimonabantRimonabant a chemical that has the opposite effect as THC on the cannaboid receptors, also causes depression, lack of appetite, and increases the chance of developing multiple sclerosis.
Guess what? The FDA hasn't approved the drug in the United States, yet it has the opposite effects of THC. Soooo why does this not make Marijuana legal yet?...Seriously. That's so retarded. That's like telling me I can't go to the bathroom, but I can't go in my pants either. Lol.