I have been on Afinitor and Exemestane for a couple months and herbal supplements for alternative treatment. I have developed cold sores in my mouth. I have used all the usual over the counter things to help with the discomfort. Doc gave me a liquid compound that has banophen, masanti and lidocaine in it. This helps too. Let me know if anyone has any other suggestions. Cold sores are one of the side effects of taking treatments, it sucks but hopefully the treatment will be effective.