I've never associated any particular antidepressant with causing a flare (and I spent a good decade and more trying out one after the other, mainly over winter) but I certainly found that Prozac did me a power of good when I went on it.
It didn't get rid of my stomach pains entirely, nor stop the bleeding entirely, but it did turn the gas ring down to a simmer rather than full heat, if you see what I mean. It was so dramatic and clear a difference that I ended up asking my GP (PCP) if I could stay on it over summertime. He said he saw no reason why not, it did have a reputation for calming stomach problems of the IBS/IBD type. I was rather tentative in making this suggestion, because when I first went on Prozac basically it rewired my personality through disinhibition, and I was left in no doubt that this was a drug that made major impacts on the Central Nervous System.
Unfortunately, what happened then was that after having several years of being on Prozac for a few months at a time, with summers off, being on Prozac non stop for a couple of years caused some kind of change in my brain chemistry. In essence, it stopped working at all on my mood, and the side effects, particularly poor cognition and memory, became absolutely diabolical. (I don't remember if it stopped working on my gut. I don't think so.)
It all sounded a bit similar to what research on Ecstasy abusers seemed to indicate. I am inclined to think that my CNS serotonin/oestrogen receptors changed as a result of the long term change in chemistry caused by the fluoxetine, and that this is not reversible with the current state of knowledge.
None of the other SSRIs that I have tried since have been effective in treating either SAD or flare-related depression or gut symptoms. Quite the opposite, they have tended to increase mood swings.
Back to the light box and fractured sleep patterns...
but noticeably improved cognition, albeit still not to previous standards.