Cosentyx is a medication used to treat psoriatic arthritis, ankylosing spondylitis, and plaque psoriasis. It is a biologic drug that works by targeting a specific protein in the immune system that is responsible for causing inflammation. The drug has been approved by the FDA for use in children and adolescents with psoriatic arthritis and enthesitis-related arthritis [3].

According to the sources provided, Cosentyx may cause side effects in adolescents. The most common side effects include upper respiratory infections, diarrhea, and reactions at the injection site. In rare cases, Cosentyx may cause serious infections, including tuberculosis, and allergic reactions [2].

It is important for adolescents taking Cosentyx to be monitored by a healthcare provider. They should be tested for tuberculosis before starting treatment and should be monitored for signs of infection during treatment. If an infection occurs, treatment with Cosentyx should be stopped until the infection is resolved [2].

In conclusion, Cosentyx may cause side effects in adolescents, including upper respiratory infections, diarrhea, and reactions at the injection site. Serious infections, including tuberculosis, and allergic reactions are rare but possible. Adolescents taking Cosentyx should be monitored by a healthcare provider and tested for tuberculosis before starting treatment. If an infection occurs, treatment with Cosentyx should be stopped until the infection is resolved [2][3].

Sources:
[2] https://www.cosentyx.com/kids-and-teens-pso-jia
[3] https://www.novartis.com/news/media-releases/novartis-cosentyx-receives-fda-approval-treatment-children-and-adolescents-enthesitis-related-arthritis-and-psoriatic-arthritis