If your dog has a runny nose and isn't sick, he might have something lodged in his nasal passages. Dogs often sniff small objects up their noses; he could have inhaled a blade of grass or a seed. Often, your dog will sneeze out the object on his own; if health symptoms persist, your vet can removed the foreign object.
Because Nystatin is not absorbed well in the bloodstream, eMedtv advises that it is not an effective remedy for fungal infections of the bladder, brain or bloodstream. It is approved for use in children and is often used to treat thrush and diaper rash in infants. According to eMedtv, Nystatin USP ointment and other forms of Nystatin are well tolerated, causing unwanted side effects in less than 0.1 percent of those who use it. Side effects of the ointment include eczema, itching, burning, rash and pain that occurs upon application.
1 Nystatin Cream is for external use only. Do not get it in your eyes, nose, or mouth. If you get it in your eyes, rinse right away with cool tap water.  PREGNANCY and BREAST-FEEDING: If you become pregnant, contact your doctor.