” It is clear, therefore, that there is sufficient anecdotal clinical data and sound experimental data to encourage proper scientific evaluation of the potential therapeutic benefit of cannabis. Although it undoubtedly possesses the potential for psychic and physical dependency, these are considerably less than the undesirable effects of opioids. The time is now appropriate, therefore, for proper evaluation of this ancient remedy.”

http://www.anesthesia-analgesia.org/content/90/2/237.long