My arthritis did not cause me pain. Instead, for me, I was put on Cosentyx to prevent the PsA from affecting my kidneys (indirectly I think). I had a protein concentration in my kidneys of over 3000 when the norm is <=30. The nephrologist (and several colleagues) considered a link between the PsA and the CKD. That's why I was put on the Cosentyx, really to fight the CKD, not arthritis.
However, to address your question, I started with a 1 dose/wk regimen for 5 weeks, and then have been on it once a month. We saw a change in the skin abrasions shortly after the end of the initial 5wk dosages.