Yeah I know of one doctor that prescribes MMJ because he used it personally to combat the effects of chemo. But then he was shit canned from the medical group that he belonged to and had to go back to private practice. So it can be tough on some doctors. I would just discuss it with him first and see where he stands on the issue. If he feels its not medicine offer to bring in some of science reports on the benefits and see if you can change his mind.