My relative has prescription for Cosentyx, but with pending job/insurance change, is afraid to begin treatment. He had miraculous results on brodalumab's drug trial, but it was discontinued suddenly, causing a severe flair event. Because Cosentyx, like brodalumab, affects interleukin-17 receptor A (IL17RA), he anticipates Cosentyx to work similar miracles for his severe arthritis and psoriatic arthritis.