Ustekinumab belongs to a class of medicines called biologics. Biologics are genetically engineered proteins. Ustekinumab works by blocking the activity of proteins known as interleukin (IL) 12 and 23.
IL-12/23 levels are increased in diseases such as psoriasis, psoriatic arthritis and inflammatory bowel disease. This medication helps to reduce the activity of the immune system and the symptoms of the disease.
Ustekinumab does not work immediately and it may take several weeks before you notice any improvement in symptoms.
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