I didn't get noticeable blisters but had thrush most of the time after about the 4th week. My docs pit me on dyflucan either oral or pill just according to how my throat felt. Dyflucan and fluconazol are the same. Good luck

Lee, age 33, stage 4a, T2N2bM0, Tumor left tonsil (removed), 2 left side nodes removed (poorly differientiatied)total of 3 nodes involved. Treatment IMRT x33/ 2x Cysplatin completed. Good Health and Good Help to you.
Lee