Hey, I did take nystatin and it irritated my stomach but i managed to take 500,000 IU 3X a day for almost a month. And I was also on diflucan for about 3 weeks before I realized it was killing my stomach.
I seemto be the odd man out though since I cannot tolerate ANYTHING in my GI tract for some reason. Medications, food, anything. Can't say that it helped too much but I do remember getting significantly improving while doing my antifungal treatment. Most of it I attribute to my change in diet though and nystatin could've helped but i'm not sure.