I'm currently getting radiation and chemotherapy for treatment of a mouth tumor. One of the chemo drugs is Erbitux. I was started on that about 6 weeks before the radiation. The Erbitux is suppose to shrink the tumor and also makes it more sensitive to the radiation when that treatment starts. It seemed to both in my case, as the tumor is much smaller now then at the start of the treatment. I don't think Erbitux will get rid of cancer on it's own, but certainly enhances the radiation. And yes, I got a bad rash, like most people do.