Could there be adverse reactions to the food colors and flavors in the nystatin?
Yes, that is a possibility. If that is the case, then you may have to use the pure nystatin powder and disguise it in food. One way to disguise it might be to combine it with fructo-oligosaccharides (FOS), an unusual sugar that cannot be utilized by the yeast, or with the herbal sweetener Stevia. FOS and Stevia are available in most large health food stores.
