Nystatin is an antifungal medication that fights infections caused by fungus. Nystatin when taken by mouth is used to treat yeast infections in the mouth or stomach. Oral nystatin is not absorbed into your bloodstream and will not treat fungal infections in other parts of the body or on the skin.Click to see full answer. Also question is, what is Nystatin oral used for?This medication is used to treat fungal infections of the mouth. Nystatin is an antifungal that works by stopping the growth of fungus. Nystatin suspension should not be used to treat fungal infections of the blood.One may also ask, can I swallow Nystatin suspension? Use a dose-measuring cup, spoon, or dropper to measure the specified dose of the suspension. Swish the suspension around in your mouth, then either spit it out or swallow it, depending upon the instructions given by your doctor. Take all of the nystatin that has been prescribed for you even if you begin to feel better. Regarding this, how do you use Nystatin mouthwash? Take this medicine by placing one-half of the dose in each side of your mouth. Hold the medicine in your mouth or swish it around in your mouth for as long as possible, then gargle and swallow.Is Nystatin an antibiotic?Nystatin (Mycostatin®, Nilstat®) Nystatin is an antifungal antibiotic produced by Streptomyces noursei. Nystatin exerts its antifungal activity by binding to sterols in the fungal cell membrane. The drug is not active against bacterial and mammalian cells because they do not contain sterols in their cell membrane.