The pathobiology of RA involves cytokine messengers such as B and T-cells, and an intricate interplay of pro-inflammatory cytokines responsible for activating and developing effector cells, in turn, accountable for local disease and systemic symptoms. Despite the fact that the cause of rheumatoid arthritis is not known, new treatments have been created as a result of better approaches towards the biology of the disease. As they target molecules directly implicated in the genesis of rheumatoid arthritis, these drugs may be more effective, targeted, and less harmful in the short and long term than standard therapies.