My wife has been on 5FU OR Xeloda (as they are similar drugs and not used together - Xeloda actually turns into 5FU when you ingest it) for the past 18 months (along with many other chemo agents). She has had limited side effects the most prevelant are: loss of feeling in her hands/feet and some added pain and discomfort in her heels.
Overall, she has tolerated it well. She started out on a Xeloda dose of 5,000mg per day but quickly reduced that to 4,000 and again recently to 3,000 mg per day. Either way, I am convinced that 5Fu OR Xeloda is a widely accepted chemo drug. My only concern in your case is that a multi agent chemo regimen may be the more aggressive approach.
In the past 18 months my wife has been on:
ECF (Epirubicin, Cisplatin, and 5FU)
Months 0-5
Oxaliplatin and Xeloda
Months 6-8
Oxaliplatin and 5FU
Months 9-12
5FU alone
Months13-16
Xeloda alone
Months 17 and 18 (she continues on this today)
Either way, your choices are limited as he has to be on some chemo agents regardless of their side effects.
Hope things improve and the chemo works for him.
With Prayers and Support
Steve (aka momwithkids)