GW Pharmaceuticals, a British company, has just requested European approval of Sativex, a "cannabinoid pharmaceutical product." ... Drugs can be, and are being, reengineered every day. Nicotine and caffeine appear in new forms. Cannabis is an herb, then a powder, then a capsule, and now a spray, with significant chemical adjustments along the way. How do you fight an enemy that keeps changing? How do you recognize when it's no longer your enemy?
More here .