TNF and rheumatoid arthritis: Tumor necrosis factor (TNF) inhibitors (etanercept, adalimumab, infliximab, golimumab, certolizumab pegol), T cell costimulatory inhibitors (abatacept), IL-6 receptor inhibitors (tocilizumab, sarilumab), and anti-CD20 antibody (rituximab) are biological DMARDs used for rheumatoid arthritis.