PLZ; I AM CURRENTLY TAKING 3- 100 MG MS CONTIN {MORPHINE SULPHATE EXTENDED RELEASE}. I HAVE BEEN ON THIS DOSAGE FOR ABOUT 15 YEARS. AS OF LATE, I AM NOT GETTING THE RELEIF I ONCE DID. CAN ANYONE SUGGEST AN ALTERNATE MEDICATION THAT IS GENERIC TO SWITCH TO. I HAVE SEVERAL ORTHOPEDIC PROBLEMS...THANK YOU !