hi wendy 67,
well i was on affinitor for 15 months, and yes certainly experienced mouth problems, the first thing i would suggest is if you can have a visit with your dentist to get your teeth checked to make sure all is ok first, there are several products on the market and they may even give you some when you start on the affinitor, there is also a pack that the drug company hands out as well it contains several items to help with mouth care, I found kennalog paste, very useful at night to put on any mouth ulcers, its a bit fiddly but worth it, i went to our womens and childrens hospital in adelaide and purchased a product they specifically make for babies who are teething, it has lignocaine in it, when i did have ulcers i found brown rice was easy to eat and really helped, but we are all individual and you may not get this problem, i found fatigue was my biggest issue, try not to eat spicy foods or anything crunchy which may excacerbate the problem, its really trial and error, but definately go for a visit for a dental check up and tell your dentist you are going on to affinitor as well he may have some tricks and tips for you, please let me know how you get on, im still on xeloda not a lot of fun but i am getting used to it at least as much as i can!!! take care,
love
wendy 55