Cosentyx is a prescription medication used to treat various inflammatory conditions, including psoriasis and psoriatic arthritis. Like all medications, Cosentyx can cause side effects, which can range from mild to severe.

According to the manufacturer's website [2], the most common side effects of Cosentyx include diarrhea, upper respiratory infections, and injection site reactions. These side effects are generally mild and go away on their own. However, some patients may experience more severe side effects, such as allergic reactions, serious infections, or tuberculosis. Patients who experience any of these symptoms should seek medical attention immediately.

Drug Patent Watch [1] states that Cosentyx has been associated with a slightly increased risk of malignancy, including skin cancer. However, the website notes that this risk is still relatively low, and the benefits of the medication may outweigh the potential risks for many patients.

Healthline [3] also notes that Cosentyx may increase the risk of certain infections, such as tuberculosis, and that patients should be screened for these infections before starting treatment. The website also cautions that patients with a history of inflammatory bowel disease may be at increased risk of developing flare-ups while taking Cosentyx.

In conclusion, Cosentyx is generally considered safe and effective for the treatment of psoriasis and psoriatic arthritis. However, like all medications, it can cause side effects, ranging from mild to severe. Patients should be aware of the potential risks associated with Cosentyx and should discuss any concerns with their healthcare provider.

Sources:
[1] https://www.drugpatentwatch.com/p/biologics/tradename/COSENTYX
[2] https://www.cosentyx.com/safety-and-side-effects
[3] https://www.healthline.com/health/drugs/cosentyx-side-effects