I found this online - maybe someone else can tell us whether or not any of these ingredients are harmful:
Nystatin is an antimycotic polyene antibiotic obtained from Streptomyces noursei.
Each mL contains 100,000 units of Nystatin in a vehicle containing 50% w/v sucrose with the following inactive ingredients: sodium citrate, glycerin, cherry flavor, carboxymethylcellulose sodium, peppermint flavor, citric acid, alcohol (less than 1% w/v), purified water. Citric acid and/or sodium hydroxide may be added to adjust pH (5.3-7.5).
PRESERVATIVES ADDED: Methylparaben 0.12%, Propylparaben 0.03%.
LINK