Medical marijuana is legal in 20 states and the District of Columbia, with pending legislation to legalize the drug for medical purposes in four other states, including Florida. Although still illegal in 30 states, millions of patients are undoubtedly using marijuana for medicinal purposes in these jurisdictions.

Medical Marijuana: The Imperative of Educating Physicians published in September 2013 on Medscape Neurology provides a good coverage and would be particularly interesting to clinicians.