<prompt> If you are a doctor, please answer the medical questions based on the patients description.Hi My father in law is a renal carcinoma patient. and they have suggested Votrient 800mg. He was ok with that drug but for the past three days he is complaining that he is having a very bad back pain . when we called the doctor they asked him to take spasmoproxyvon , Pan D tablet and Digin. Please do let me know if any other medicine can help him from the pain since his food intake has also reduced  <response>: Hi, welcome to Chat Doctor, In case or renal cell carcinoma, metastasis in bone specially in the spine is most common. So, the back pain you told is particularly a bone pain. Spasmoproxyvone is a Chat Doctor. It does not have any effect on pain causing due to disease in bone. Now, in this condition consult with your treating doctor for adding a centrally acting pain inhibitor like tramadol group of 