So sorry to read about this situation. If the Zofran (Ondansetron) and other oral anti-nausea medications don’t seem to be working, maybe eating small spoons of crushed ice chips would give some relief. I’m not sure if they actually know why ice chips works for nausea, but on occasion it does give relief as long as it’s not contraindicated with what’s going on orally with him.

SSC Lt sublingual tongue; Age 62
Positive biopsy 20June2019
Staging done 2 Jul : Stage 1
Quit smoking 15 years ago; not a drinker; no HPV
Pet/ CT 6Jul2019 : Negative. Not even the Lt tongue lit up.
Partial Glossectomy 22Jul2019