Of course marijuana is an addictive drug. No one can debate that. We need clinical practice guidelines on physicians using it safely. The best I know of are by Dr. Mel Kahan from Toronto, who is planning to release a paper in Canadian Family Physician to guide physicians on how best to prescribe it safely given that it will be a matter of a clinical judgment now. Generally, physicians are quite unprepared to face this as an issue.
On December 9th, 2013. See this statement in context.