One of the more thoughtful and thorough essays on the use of marijuana for the treatment of pain is published by the National Pain Foundation, written by Bill H. McCarberg, M.D. The paper addresses the issue "What scientific reasons do doctors have to think that cannabinoids actually work? Do they provide genuine symptom improvement, or do patients become intoxicated and merely think that their symptoms are reduced?"
Having posed that question Dr. McCarberg presents a summary of the cannabinoid receptor system and the use of marijuana as a medicine.
Read the paper and access the National Pain Foundation's resources here.