Cosentyx is a prescription medication used to treat certain autoimmune diseases such as psoriasis, psoriatic arthritis, and ankylosing spondylitis. While Cosentyx has been proven to be effective in treating these conditions, it may also cause some side effects [1].

The most common side effects of Cosentyx include upper respiratory tract infections, diarrhea, and skin reactions such as rash and itching. Other side effects that have been reported include headaches, fatigue, and nausea. These side effects are generally mild and go away on their own [2].

In rare cases, more serious side effects may occur. These can include allergic reactions, infections, and worsening of existing medical conditions. If you experience any of these side effects, it is important to contact your healthcare provider immediately [3].

It is worth noting that the side effects of Cosentyx may vary depending on the individual. Some people may experience no side effects at all, while others may experience more severe side effects. It is important to talk to your healthcare provider about any concerns you may have regarding the use of Cosentyx [1].

In conclusion, while Cosentyx is generally well-tolerated, it may cause some side effects. The most common side effects are generally mild and go away on their own, but more serious side effects may occur in rare cases. It is important to talk to your healthcare provider about any concerns you may have regarding the use of Cosentyx [1][2][3].

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