大麻已在世界各地使用几千年来治疗各种疾病。中国神农氏是第一个记录大麻作为医疗药物在公元前2737他在治疗风湿和痛风相关的疼痛记载药物的效果。医用大麻合法化长期以来美国社会和政府内部讨论。大麻在美国的药品，直到1937年大麻税法，其中联邦禁止大麻合法来源。Prior to the enactment of the Marijuana Tax Act, there were at least twenty-seven legal medicines that contained marijuana available in the U.S. In 1970, The Controlled Substances Act placed marijuana into a Schedule I status defining it as having a high potential for abuse, no currently accepted medical use in treatment in the U.S. and a lack of accepted safety for use under medical supervision. Currently it remains illegal under federal law in the United States other than the four Americans that were grandfathered under the Compassionate Investigational New Drug Program. Contradictory to federal law, at present, medical marijuana is legalized in sixteen states and Washington, DC. There have been multiple studies and research done by advocates for and against medical marijuana legalization. Although there are strong arguments by both sides, federally legalizing the use of medical marijuana is the better choice because it has beneficial effects to patients suffering from various ailments; it will cause a decrease in recreational use nationwide; and it is less harmful to the user than many other prescription medications. At present, the pros outweigh the cons when considering the positive benefits to medical marijuana.
1988年9月6日，缉毒局的首席行政法官弗朗西斯L.年轻，裁定：“大麻在其自然形态，是人类已知的最安全的治疗活性物质之一......” [案号86-22]。The principal constituent of marijuana, tetrahydrocannabinol (THC), is effective in treating nausea, vomiting, appetite loss, and acute or chronic pain. Specifically, marijuana has been proven to give relief from nausea and appetite loss caused by AIDS. It reduces intraocular pressure caused by glaucoma. Additionally; it has positive effects on persons suffering from cancer, multiple sclerosis, epilepsy, and other conditions with chronic pain. Beside the medical evidence that marijuana is helpful in treating certain ailments, there are numerous organizations that support some type of physician supervised access to medical marijuana including the American Academy of Family Physicians, American Nurses Association, American Health Association and the New England Journal of Medicine. Millions of patients in the U.S. could be helped by medical marijuana.
On April 20, 2006, the U.S. Food and Drug Administration (FDA) posted the following “Inter-Agency Advisory” on its website, www.fda.gov, “… A past evaluation by several Department of Health and Human Services agencies… concluded that no sound scientific studies supported medical use of marijuana for treatment in the United States, and no animal or human data supported the safety of efficacy of marijuana for general medical use.” Medical marijuana is not the only source of pain relief that contains THC available to patients. Marinol, a pill with synthetic THC, is often prescribed to patients suffering from AIDS, or cancer patients that have gone through chemotherapy. Unlike medical marijuana, Marinol is FDA approved. It seems as though Marinol could substitute marijuana for treating symptoms related to AIDS and cancer chemotherapy; until you consider some other facts that prove otherwise. First, Marinol only provides limited relief to a select group of patients. It also does not have the same effect for the number of different ailments as marijuana. Marijuana or cannibas is made of multiple...
大麻是比单纯D9-tetrahydrocannabinolby伊桑B.鲁索和John M.佩肯麦克帕兰。2003年精神药理学（2003）165：431-432。网页。2011 8月16日。