Medical cannabis is emerging as an effective treatment option for the management of a variety of common chronic conditions and symptoms, but a lack of scientific evidence demonstrating its efficacy for treating specific indications is hindering the widespread clinical adoption of medical cannabis. Between January 2015 and December 2016, patients who were prescribed medical cannabis in Canada from a single licensed medical cannabis provider were invited to complete an online survey approximately 15-25 minutes in length that assessed baseline demographics. Patients who completed the baseline survey were subsequently invited to complete follow-up surveys at 4 months and 10 months after the completion of the initial survey. The results are described in this book, and the authors hope the information will further facilitate the use of medical cannabis for the benefit of various populations in need.