Cosentyx is a medication used to treat various conditions, including psoriasis, psoriatic arthritis, and ankylosing spondylitis. While it is generally well-tolerated, like any medication, it can have side effects. However, it is important to note that the information provided by the sources does not specifically mention the side effects of Cosentyx in children. The sources mainly discuss the overall safety profile of Cosentyx in adults.

According to the sources, the most common side effects of Cosentyx in adults include upper respiratory tract infections, diarrhea, and nasopharyngitis. Other reported side effects include allergic reactions, such as rash or hives, and injection site reactions. It is important to note that these side effects are not specific to children and may vary from person to person.

Since the sources do not provide specific information about the side effects of Cosentyx in children, it is crucial to consult a healthcare professional or pediatrician for accurate and reliable information regarding the use of Cosentyx in children. They will be able to provide the most up-to-date and relevant information based on the child's specific condition and medical history.

In conclusion, while the sources provide information about the side effects of Cosentyx in adults, they do not specifically address the side effects in children. It is essential to consult a healthcare professional for accurate and reliable information regarding the use of Cosentyx in children.

Sources:
[1] Drug Patent Watch. (n.d.). Cosentyx - Clinical Trials. Retrieved from https://www.drugpatentwatch.com/p/biologics/tradename/COSENTYX
[2] Medical News Today. (2021, January 27). Cosentyx: Uses, dosage, side effects, and more. Retrieved from https://www.medicalnewstoday.com/articles/drugs-cosentyx-side-effects
[3] Cosentyx. (n.d.). Safety and Side Effects. Retrieved from https://www.cosentyx.com/all/safety-and-side-effects