My husband had amophostine shots before each treatment (42 treatments total)
This shot is given to further protect saliva glands. I guess this is a bit controversial in some medical communities but we did it.
We were told that some docs say it doesn't work, however, my hubbie was blasted with rad and he has very good saliva.
The main complication is nausea, so he took an anti- nausea drug a half hour before treatment and never had an issue with that side effect. Today, his radiologist says that he has more saliva than many of his patients. I would strongly recommend looking into this. Quality of life after treatment is important and the more saliva you have , the better.
I highly recommend gultimine, also. My husband took this all the way thru treatment 30 mg a day - and a boost before radiation treatments. This helped with muscle, saliva and mouth sore prevention.