I can't take mesalamines now because of acute pancreatitis that landed me in the hospital. I understand the frustration of having to move medications, though in my case the mesalamines were not working that well anymore. I am sorry you are going through this. I know for me it wasn't a very good feeling to be sent home on just steroids while flaring. I am on Entyvio now, and of everything, am most comfortable with its side effects as it is gut specific. Sometimes insurance won't let you start there, though. I had to do Humira first, but had a reaction.
36yr old mother of 3 Moderate Pancolitis 1/3/17. Hosp 1 week on Solumedrol, Delzicol. Apriso, pred, then switched to Balsazide 750 mg, and Uceris 9 mg 3 wks. Minor flare in August, flare since Oct 20. Acute pancreatitis from Balsalazide hosp. 2 days, Started Humira 12/15/17, reaction, Entyvio 1/12/18. 40 mg of Pred, still waiting for a change!