The medical treatment of rheumatoid arthritis has been dramatically improved with the advances of newer disease-modifying antirheumatic drugs (DMARDs) and biologic agents during previous decades. To prevent joint damage, it is essential to start DMARD treatment early, especially within the first 3 months after diagnosis. Tight control of disease activity, and the thorough monitoring of the treatment's efficacy and the side effects of medications are also important. Nonsteroidal anti-inflammatory drugs (NSAIDs) are usually used to control pain and swelling of the joints. However, these drugs cannot alter the disease course of rheumatoid arthritis. It is therefore necessary to introduce DMARDs at the beginning of treatment, and, after achieving the effect of DMARDs, NSAIDs should be tapered as soon as possible. The main treatment should be DMARDs, which must be used wisely and appropriately. It is also important to adjust DMARD therapy during the course of treatment according to disease activity. Glucocorticoids have potent anti-inflammatory effects and can control inflammation dramatically. However, because of the diverse and serious side effects of glucocorticoids, the usage of glucocorticoids should be limited to low-dose oral therapy or intra-articular injection, unless otherwise indicated. Along with biologics, there are now various weapons available against rheumatoid arthritis, and it can be treated much more effectively than before.