Cosentyx is a medication that is used to treat psoriasis, psoriatic arthritis, and ankylosing spondylitis. According to the sources provided, the frequency of taking Cosentyx depends on the condition being treated.

For psoriasis, Cosentyx is typically taken once a week for the first five weeks, followed by a dose every four weeks thereafter [1]. For psoriatic arthritis, Cosentyx is taken as a subcutaneous injection once a month after an initial loading dose [2]. The initial loading dose for psoriatic arthritis is 300 mg, followed by 150 mg once a month [2]. For ankylosing spondylitis, the initial dose is also 300 mg, followed by 150 mg once a month [3].

It is important to note that the dosing and frequency of Cosentyx may vary depending on individual patient factors, such as their weight, medical history, and response to treatment. Therefore, patients should always follow their doctor's instructions regarding the dosing and frequency of Cosentyx.

In conclusion, the frequency of taking Cosentyx depends on the condition being treated. For psoriasis, Cosentyx is taken once a week for the first five weeks, followed by a dose every four weeks thereafter. For psoriatic arthritis and ankylosing spondylitis, the initial dose is 300 mg, followed by 150 mg once a month. Patients should always follow their doctor's instructions regarding the dosing and frequency of Cosentyx.

Sources:
[1] https://www.drugpatentwatch.com/p/biologics/tradename/COSENTYX
[2] https://www.cosentyx.com/psoriatic-arthritis/faq
[3] https://www.medicalnewstoday.com/articles/326632