[ElaineM]

I don't know much about this, but I think there are members here who have tried Tykerb with various other drugs. I have read literature about using Tykerb with other drugs. If you can't tolerate the Xeloda keep reminding your doc about it and ask him or her to look for something else.
Everyone's body is different. The same things don't work the same for everyone. Ten different people can have 10 different side effects just because everyone's body is a little different. Sometimes docs forget that and keep prescribing the same combination to everyone. If your doc won't or can't help you it might be good to get a second opinion.
Different docs have different experiences with different people. All docs have different interests and tend to read up on things they are interested in more than other things they are not interested in.
By the way, have you tried fresh or dried ginger with hot water for nausea? Sometimes that helps. Digestive enzymes may work for heartburn. Sometimes probiotics (friendly bacteria in yoghurt) help various stomach issues. Sometimes soft plain rice with fresh ginger and an egg helps with the runs.
I hope you feel better very soon. Take care !!