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

Doxycycline capsule, 100 mg, taken twice daily

Applied to the face, hands, feet, neck, back, and chest each evening (Topical cream)

Applied to exposed skin areas at least 30 minutes before going outdoors each morning.

Applied to the face, hands, feet, neck, back, and chest each morning after sunscreen

Recommended for daily use if rash returns (Topical cream)

Patients will receive a Medrol dose-pack while continuing the extensive treatment regimen.