Roy H. Hart, MD

Given that cannabis (marijuana, hashish, ganja, dagga, etc.) is the most widely used illicit substance in the Western world, it behooves us as physicians to understand as much about it as possible. The cannabinoid receptor is a good starting point in such a pursuit. Marijuana is not a single substance, but a collection of substances or compounds which become 2,000 on pyrolysis. Numbered among the 400 constituents of the plant Cannabis sativa are some 60 cannabinoids.