Rheumatoid arthritis is a disease that is difficult to cure completely. The treatment goal for patients is to achieve remission by taking therapeutic drugs. Therapeutic drugs have advanced considerably, and the remission rate in Japan has improved over the years, now standing at 61%. In particular, the development of the anti-rheumatic drug "methotrexate" and the launch of biologics have been particularly effective. Currently, 90% of rheumatoid arthritis patients are reported to be satisfied with their medication. How do the drugs work? What are the side effects? Find out the latest on drug treatment of rheumatoid arthritis.