Interesting article. In short: they've found that fasting mice before a chemo dose eliminates side effects. The chemo doses they were giving the mice were so high that the non-fasting mice died. Now they're going to try a similar study on humans. The case reports mentioned support the idea that fasting for 2-3 days prior to a chemotherapy treatment, and continuing the fast until the longest acting drug has cleared the system, may eliminate side effects, and may also improve the efficacy of the drugs.
If you're interested, the Denver Naturopath who posted the info above has an email newsletter that is supposed to be quite good. Sign up at http://denvernaturopathic.com/. I just did.