I used it years ago post-RT. My RO prescribed it to help heal the mouth ulcers and ward off some necrosis of my jaw. He prescribed it along with Vitamin E. He said to try it before going thru HBO. Not sure if it help as I did see some improvement, but did eventually go with HBO.

Susan

SCC R-Lateral tongue, T1N0M0
Age 47 at Dx, non-smoker, casual drinker, HPV-
Surgery: June 2005
RT: Feb-Apr 2006
HBOT: 45 in 2008; 30 in 2013; 30 in 2022 -> Total 105!
Recurrence/Surgeries: Jan & Apr 2010
Biopsy 2/2011: Moderate dysplasia
Surgery 4/2011: Mild dysplasia
Dental issues: 2013-2022 (ORN)