According to the sources provided, there are no specific dosage adjustments for Cosentyx based on age.

Cosentyx (secukinumab) is a biologic medication used to treat various autoimmune diseases such as psoriasis, psoriatic arthritis, and ankylosing spondylitis. The recommended dosage for Cosentyx is based on the patient's weight and the condition being treated, not on age [1,3].

However, it is important to note that elderly patients may be more susceptible to certain adverse effects of Cosentyx, such as infections. Therefore, caution should be taken when prescribing Cosentyx to elderly patients, and they should be monitored closely for any adverse effects [2].

In summary, there are no specific dosage adjustments for Cosentyx based on age, but caution should be taken when prescribing to elderly patients due to their increased susceptibility to adverse effects.

Sources:
[1] https://www.drugpatentwatch.com/p/biologics/tradename/COSENTYX
[2] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6422944/
[3] https://www.novartis.com/us-en/sites/novartis_us/files/cosentyx.pdf