Skin Rash Study Before Chemotherapy in Colorectal & Head and Neck Cancer Patients

The purpose of this study is to determine if using preventive treatments such as Doxycycline (an anti-biotic) capsules, sunscreen with SPF 30, Hydrocortisone 1% cream and a moisturizer will help to reduce the incidence and severity of the skin rash associated with Cetuximab (Erbitux) when compared to receiving standard care for the treatment of skin rash.