Of course all drugs can be abused but introducing one into the system full in the knowledge that it will be abused is an entirely different matter. On the basis of the balance of probabilities, the moment any government says that cannabis is safe to use and, more than that, beneficial to health then every pothead in that jurisdiction has an excuse.  The only way the War on Drugs can work is if prohibition is applied universally. We expect doctors to work within the law and the government, along with medical governing bodies, has a role in determining what it is appropriate to prescribe and what is not [i] .  There are no situations where society simply stands back and leaves it to individual clinicians to act without guidance. They act within a framework that gives primacy to clinical need but does not ignore the wider social implications. Society regulates when a doctor can rules that someone is incapable of work or needs surgery at the expense of the state. In this particular regard, governments feel that society is best served by not adding cannabis to the pharmaceutical melting pot.  [i] Comment. “Kent Doctor Richard Scott Warned Over Faith Discussion”. BBC. 23 May 2011.