hi painkillers like diclofenac, especially NSAIDS (non steroidal anti-inflammatory drugs) are very dangerous & cause organ damage. most of the commonly affected organs are the kidneys sometimes leading to renal failure ,landing to life threatening problems. the other organs affected can be liver and gastro-intestinal tract. comparitively tramadol is more safer with less organ damage. you can switch on to tramadol. but try to reduce the usage of all these drugs unnecesarily, unless indicated. all the best take care