Hi Claudia,
I too lost a lot of weight during treatment -over 60 lbs. But it was mainly due to the treatment rather than the dry mouth. Like Joanna, I am supposed to have a partial recovery because of the IMRT radiation I had. It hasn't really happened yet however, so I still carry a bottle of water everywhere and avoid dry things like chips, crackers, etc. I drink a lot of liquids when eating and have to get up sometimes twice in the middle of the night to pee (LOL)! But I have gained 9 lbs. and Joanna is absolutely right that you need to see a nutritionist and possibly a doctor also to get things checked out. After a year, you should have put some weight back on. Certain foods are much more dry mouth friendly than others such as pasta's, red meat (not well done), soups, stews, etc. I also had to experiment with swallowing techniques.