Abstract
Inflammatory bowel diseases—ulcerative colitis and Crohn’s disease—are linked with several environmental and genetic risk factors. There are also known drugs able to induce de novo disease or to exacerbate its course. Several autoimmune disorders are more frequent in patients with inflammatory bowel diseases, including psoriasis. The aim of the presented review was to summarise current knowledge on the links between psoriasis therapy and inflammatory bowel diseases. The interleukin-17 inhibitors (secukinumab, brodalumab and ixekizumab) and tumour necrosis factor inhibitor (etanercept), have the potential to induce ulcerative colitis and Crohn’s disease de novo or exacerbate existing but silent diseases. There is no evidence that other biologic agents used in psoriasis are lined with such risk. The biologic drugs for psoriasis differ in their potential to induce or worsen inflammatory bowel diseases. Currently, there are no recommendations in European guidelines to screen patients with psoriasis for inflammatory bowel diseases. However, based on available evidence, inflammatory bowel diseases should not be forgotten on in-depth diagnostics in patients with psoriasis.
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