In a landmark article in the Journal of Opioid Management, University of Washington researcher Sunil Aggarwal and colleagues document 33 U.S. controlled clinical trials published from 1971 to 2009 confirming that marijuana is a safe, effective medicine for specific medical conditions.

Under federal law, marijuana is classified as a Schedule I drug, defining it as having high potential for abuse, unsafe for use even under medical supervision, and lacking currently accepted medical uses in the U.S. “In fact,” Aggarwal and colleagues write, “nearly all of the 33 published controlled clinical trials conducted in the United States have shown significant and measurable benefits in subjects receiving the treatment.” Additionally, the paper documents the growing acceptance of the therapeutic use of marijuana among organized medicine groups and estimates that “in 2008, approximately 7,000 American physicians have made such authorizations for a total of approximately 400,000 patients.”

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