Longest time on a successful treatment for psoriasis

[Fred]

I was thinking after Stelara finally giving up on me after almost five years it would be interesting to see if we could find out from our members and guests what has been the longest amount of successful time on one psoriasis treatment, you can vote in the poll above and members can add to this thread if they wish.

For me it's been my latest treatment that has been the most successful, Stelara almost made five years but has let me down a couple of times and now it's failed big time with psoriatic arthritis. So I'm voting 4