• Wayne Hall.
• The Centre for Youth Substance Abuse Research, The University of Queensland and National Addiction Centre, Australia, and National Addiction Centre, Kings College London, United Kingdom.
• Yale J Biol Med. 2015 Sep 1; 88 (3): 257-64.

AbstractThis paper discusses the evolution of U.S. policy responses to calls to allow patients to use cannabis for medical purposes. It first summarizes the research evidence on the safety and efficacy of cannabinoids for various medical uses. It then outlines the challenges in developing new pharmaceutical cannabinoids that are safe, effective, and acceptable to patients. It briefly describes the strengths and limitations of the different ways in which U.S. states have allowed patients to use cannabis for medical purposes. These include allowing access for research trials only, allowing medical necessity as a defense against prosecution, and allowing commercial medical dispensaries to provide cannabis to approved patients. It argues that liberal definitions of indications for medical cannabis use and the commercialization of medical cannabis supply in California have produced the de facto legalization of recreational cannabis use.

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