I've heard that it's getting harder to receive narcotics even for cancer patients undergoing radiation and chemotherapy. Depending on what type of cancer you have and how far it's progressed your oncologist should be the only one you need to talk to about analgesia, however you could also go to your primary care physician or even an urgent care physician to receive at least a small amount of a narcotic pain reliever. Your chances of getting real hydromorphone through the internet probably in line with your chances of winning the lottery