Welcome to Crohn's Forum, a support group for people with all forms of IBD. While this community is not a substitute for doctor's advice and we cannot treat or diagnose, we find being able to communicate with others who have IBD is invaluable as we navigate our struggles and celebrate our successes. We invite you to join us.
If she is in remission, what is the point of changing biologics? Has she gotten a colonoscopy to show that there is inflammation and other issues? What I would be concerned is that if she is does not have good results from Stelara, she would most likely not be able to go back on Remicade due to antibody formation. If it isn't broke, don't fix it.
As for me personally, I have never been on Stelara. I have been on Remicade and it has worked great for me.
I remember when I switched earlier than I thought they should on ?? sorry can't remember they told me sometimes it's better to switch when you're doing ok. When you're in crisis it's so much harder for your body to catch up.
I'm going to start Stelara in about 6 weeks so sorry can't advise on. I was on Remicade and was doing great then about the 6 month mark I got Lupis from it. Rarer side effect from it I guess unfortunately because it was a wonder drug for me.