At the end of June, more than 200,000 Canadians were registered to buy medical marijuana from more than 60 licensed Canadian producers. People use the drug to treat everything from migraines to cancer-related symptoms. But how much has science been able to prove about how the drug can treat these health issues? The Agenda discusses the myths and the facts behind medical marijuana with Dr. Hance Clarke, Director of Pain Services at Toronto General Hospital and a member of Avicanna’s Scientific Advisory Board.