It is a bit daunting that it contains an ingredient that we shouldn’t have on the diet.
If I remember correctly, Dvjorge here who recommends nystatin both orally and via enemas, he says without sucrose is better, but because nystatin is such a powerful antifungal, the sucrose probably won’t feed them much.
It’s like giving us our favorite food but with cyanide in it. It will kill them faster than they can eat the sucrose.
The only thing I’d be worried about would be feeding other organisms, like bad bacteria or parasites. I’d suggest keeping to the strict diet, supporting your detoxing pathways and liver, and use the nystatin correctly for the amount of time the doctor recommends.