hi thank you for the query I have gone through your query understood your concerns... sir upper back pain in kidney area I would like to give you some causes of pain muscle pull vertebral column disease liver and gall bladder infection renal pathology pravachol has got muscle pull as the rare side effect which I don t think is the cause of your pain after taking so many long years but still takingthe benefit of doubt you can consult your GP and should continue taking pravachol..and next I would like to suggest you to get an ultra sound abdomen done to rule out liver gall bladder and renal pathologies if any which is causing your pain at kidney area, clinically pain because of renal pathology will be associated with nausea vomittings and radiation to groin and urinary symptoms like dysuria hematuria so I hope that pain you are suffering from will not be cause of kidney problem hope I have answered your query thank you regards DR Alekhya