Cosentyx has not been discontinued. In fact, it is still available on the market and is used to treat various conditions such as psoriasis, psoriatic arthritis, and ankylosing spondylitis [3].

The sources provided do not indicate that Cosentyx has been discontinued. The first source [1] provides information on the drug's patent expiration date, which is set to occur in 2031. The second source [2] is the FDA label for Cosentyx, which outlines the approved uses, dosage, administration, and safety information for the drug. It does not mention any discontinuation of the drug. The third source [3] is the official website for Cosentyx, which provides information on the drug's uses, benefits, and frequently asked questions. It also does not mention any discontinuation of the drug.

In conclusion, based on the provided sources, there is no evidence to suggest that Cosentyx has been discontinued. It is still available on the market and is used to treat various conditions.

Sources:
[1] https://www.drugpatentwatch.com/p/biologics/tradename/COSENTYX
[2] https://www.accessdata.fda.gov/drugsatfda_docs/label/2016/125504s001s002lbl.pdf
[3] https://www.cosentyx.com/ankylosing-spondylitis/faq