I had stage 4 adenoid cystic carcinoma in 2001. I ate oatmeal and drank Boost drinks for 1.5 months. My dry mouth still affects me. My doctors had me using Biotene products to help with that. I had another cancer patient tell me that Sprite helped them. Because of my dry mouth I am having a lot of dental issues. I am having all my teeth pulled on the top in the next month. I will be getting dentures. If I could give anyone advice with head and neck cancer, get your teeth pulled first. I have been battling teeth issues since day one. I also did neutron beam radiation at the U of Washington. Good luck to you. If I can help with anything let me know. Thanks