DR P. MARAZZI / SCIENCE PHOTO LIBRARY DR P. MARAZZI / SCIENCE PHOTO LIBRARY
Stelara psoriasis drug being injected into a patient. This drug, which contains the active ingredient ustekinumab, is used to treat plaque psoriasis and psoriatic arthritis. It is a human monoclonal antibody drug that blocks interleukin 12 and interleukin 23, which are involved in the inflammatory response.
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