1 tsp baking soda
1 tsp salt
16 oz water
Mix this up every other day or as often as needed. Can be used often as needed, before and after trying to eat. My husband found it very helpful when he was on 5 FU.
There are others, such as the ones with lidocaine and they are even more effective, but this one can be used anytime, and you don't have to wait for a prescription.
Good luck and God bless