My husband was treated with Erbitux. Got the rash immediately and was then given Benadryl with each treatment. He was having RT at the same time. Much more problems from the RT than the Erbitux. Post chemo and RT his tumor was gone - couldn't see it, feel it or find it on CT scan. Docs want him to have ND for lymph node that didn't go down as much as they wanted and that is our current issue but the Erbitux appears to have done well for him in combo with the RT.