Humira is used in combination with methotrexate, or on its own in patients who cannot take methotrexate; • adults with active and progressive psoriatic arthritis (a disease causing red, scaly patches on the skin and inflammation of the joints) who have not responded adequately to other treatments; • adults with severe active ankylosing spondylitis (a disease causing inflammation and pain in the joints of the spine) who have not responded adequately to other treatments; • adults with severe active Crohn’ s disease (a disease causing inflammation of the gut) who have not responded adequately to other treatments; • adults with psoriasis (a disease causing red, scaly patches on the skin) who have not responded adequately to other treatments.