Iatrogenic effects of biologics for psoriasis.

Use of the biologic agents in moderate to severe chronic plaque psoriasis has provided novel and highly efficacious treatment options. Generally less systemically toxic than more traditional agents, the risks and benefits for these agents must also be considered. We present a review of the iatrogenic effects associated with use of the biologic agents in psoriasis. Focus is placed on antitumor necrosis factor agents, because they are the most studied and commonly used agents, as well as T-cell modulators and interleukin inhibitors.