Its probably a cold sore and that won't respond to nystatin. nystatin is for fungus, cold sores are caused by viruses.
You need Blistex, not nystatin.
- Nystatin Information for Consumers
- Nystatin Information for Healthcare Professionals (includes dosage details)
- Side Effects of Nystatin (detailed)
Search for questions
Still looking for answers? Try searching for what you seek or ask your own question.