Stelara (ustekinumab) is an expensive drug used to treat plaque psoriasis, psoriatic arthritis and ulcerative colitis. This medicine is also used to treat Crohn's disease. It is not a cure. This drug is more popular than comparable drugs. There are currently no generic alternatives to Stelara. While 96% of insurance plans cover the most common version of Stelara at a co-pay of $32.50-$80.00, many of them have restrictions.

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