Hi, my friend have been diagnosed with arthritis since last 9-10 years .He got his knee replaced 3-4 years back. He take pain killers now and his weight has also been reduced then before. He feels tired all the times and sometimes heart palpitations too. He has tried allopathic,homeopathy and ayurveda too,but not cured. Is there any cure for his problem ? Also wanted to know can arthritis be cured at any stage even after trying all sorts of medications.