Renal Replacement Therapy

[Guest]

My best friend of 30 years was diagnosed with Goodpasture's Syndrome about ten years ago. Her kidneys failed and she was on dialysis until about two years ago when she had a kidney transplant. Since the transplant, she has complained about severe migrains and terrible pain in her abdomen, her neck and shoulders. She is currently on some serious pain medication (dilauded) (Vicoden) and one other that I can't remember. She takes anti-rejection medications, benedryl and potassium oxide supplements. She takes several of the pain pills each day and says that she knows that she is somewhat addicted but without them she would be in serious pain and unable to function.
My question is this: Is the pain directly related to the kidney transplant or is it a result of increasingly large doses of the pain medication (withdrawal symptoms?) Her family and I are really concerned and would like to know if we need to intervene with her Doctor. She has told us that the Dr. seems to have no problem prescribing these medications for her although none of us have been able to confirm this with him.
Thanks for your answer