Nystatin worked for me for about 3 days and then candida just laughed at it. Dont thing nystatin is strong enough for deep rooted systemic Hyphal candida. Might work for mild candida "yeast". Candida develops a resistance too fast with nystatin.
Nystatin is effective against candida albicans and other species but not all candida species. It works inside of the gut and doesn't cross the intestinal lining so there is no way it can reach the liver. It is fungicidal against candida. The most effective form is refrigerated powder. Nystatin like many other antifungals don't work if you don't follow an anticandida diet. Some people need until 3 000 000 of units a day or more to get results. Candida Albicans doesn't develop resistance to it theorically. Nystatin and Oral Amp B are probably the most effective antifungals to treat an intestinal infection since they are fungicidal and totally safe.
I am kind of in the same state as LorciaLady posted above. I am also having some gluten intolerance that I never had before. I also never see signs of candida in my stools but since starting Nystatin, I feel a little better. So maybe candida is the prime culprit!