You are taking Valium and a muscle relaxer for MS??? Neither of these IMO help much for back pain. I have chronic pain and I have been prescribed Flexerill and Vicodin. Since the VA doesn't want me addicted they have me trying Lodine now. Ultimately it's up to you but a safe natural remedy for pain may be the ticket. I have done a lot of research regarding MJ and there has never been an overdose and it has great promise for pain relief.