Nilstat Drops 50ml (Nystatin) for Mouth Ulcers - derma.pkWhat are Nilstat Drops? Nilstat Drops are a medicine that gets rid of those painful sores you get in your mouth, called mouth ulcers. They have a special ingredient called Nystatin. Nystatin is an antifungal medicine, which means it fights off the tiny organisms (fungus) that cause these ulcers. How do Nilstat Drops work? Think of it like this: the fungus is like a tiny balloon. Nystatin pokes holes in this balloon, making it weak. Once the balloon