As NY and NJ enter the legal recreational cannabis era, New York State launched a series of ads promoting "Cannabis Conversations" around some of the issues with legalization, including what's called "cannabis use disorder." Chinazo Cunningham, MD, commissioner of the New York Office of Addiction Services and Supports (OASAS) and professor of Medicine, Family and Social Medicine, and Psychiatry and Behavioral Sciences at Montefiore Health System and the Albert Einstein College of Medicine, talks about what it is and how to recognize and treat it.