Xeloda/Tykerb side effects

Shortly, I am going to start this combination and am worried about the side effects. Can anyone share how quickly they start (nausea, diarrhea, rashes, H+FS? Within a week? Within two weeks? Anyone out there who has tolerated the combination well with few or no side effects? Once they start, do they get better once your body gets used to it? Has anyone used henna to relieve the HFS? Any hints or insight anyone can provide would be most welcome!!