When I had AS I got iritis about once a year. I took Prednefrin forte drops to help the symptoms go away quicker. A number of years ago I focused on healing my Leaky Gut. I healed my gut just over 3 yrs ago now. Since doing that, I no longer have any back pain and haven't had iritis since. So I would suggest to AS sufferers to focus on healing their gut (the root cause), not treating symptoms.