Hello Michael;
welcome to HealthcareMagic
Since you have rod in your leg because of fracture of femur the pain is probably related to the implant in your body.Since 15 yrs have passed it will be better to consult the operating surgeon or a Orthopaedician for opinion regarding the steel rod .The pain you are having may be due to inflammation in your joint caused due to the rod.The painkillers you are taking that is myoneural injections as well as epidural are relieving the pain but i guess the inflammation remains so it is better to consult a Ortho for opinion and he will advise you regarding further management.
Thanks

Dear 54yr old, thanks for your question. Your hip seems to have been fractured just below the neck of Femur 15 yrs back and I assume the rod must have been a Proximal femoral Nail or PFN. Kindly mail a scanned X-ray if you can, coz as I see it, we first need to establish the cause of pain, having done that you also need to specify if the pain has been consistently felt throughout and of same intensity. I'd also like to know the nature of pain, the exact site (if its not vague), the range of motion of your leg, if associated with shortening and lastly do you have any co-morbidities like diabetes/hypertension. Its inappropriate to comment on the diagnosis of your condition and its fate on the very few symptoms you have mentioned but this might turn out to be a case of Avascular Necrosis of head of Femur(since the fracture was close to the neck of Femur causing blockage to its blood supply). Hope to hear from you soon with my requirements. And one more thing..avoid pain management until you establish the cause of pain.taking injections, steroids, analgesics is not recommended over a period of time. Good day.