Thanks in part to the Netherlands' policy of marijuana decriminalization, there are people living in the Dutch city of Utrecht whose addiction to cannabis prevents them from getting effective treatment for mental illness. According to a September 10 statement from Utrecht Mayor Wolfsen, "There is a group of about eighty people with a chronic psychotic disorder who barely respond to their treatment. A possible explanation for this is their severe dependence [on] cannabis."
Cannabis was condemned by the 1961 Single Convention on Narcotic Drugs as a psychoactive drug with “particularly dangerous properties” and hardly any therapeutic value. Ever since, an increasing number of countries have shown discomfort with the treaty regime’s strictures through soft defections, stretching its legal flexibility to sometimes questionable limits.