TNF blockers are used to treat autoimmune disorders such as rheumatoid arthritis, psoriatic arthritis, and Crohn's disease. They also have many other uses, such as treating ankylosing spondylitis and ulcerative colitis. TNF blockers work by inhibiting inflammation-causing tumor necrosis factor (TNF) proteins. These medications come as injections and infusions. Examples include Humira (adalimumab), Enbrel (etanercept), and Remicade (infliximab).