There is good evidence for the efficacy of marijuana in cancer and non-cancer chronic pain, nausea and vomiting from chemotherapeutic drugs, radiation and multiple sclerosis, as well as promising evidence for a number of other illnesses. Like every other drug, marijuana has side effects, but they are comparatively few and confined to heavy users. Barack Obama was correct in likening marijuana to other pharmaceutical products, right in promising to end W's marijuana witch hunt, and deceitfully wrong in escalating that witch hunt beyond Bush's wildest dreams.