Pilot Study of Pulmozyme (rhDNase) in Patients With Head and Neck Cancers Treated With Radiation Therapy + Chemotherapy

RATIONALE: Nebulized dornase alfa inhalation solution may decrease the thickness of saliva in the mouth and improve quality of life in patients undergoing radiation therapy and chemotherapy for head and neck cancer. It is not yet known whether dornase alfa inhalation solution is more effective than a placebo in lessening the discomfort of treatment in these patients. PURPOSE: This randomized clinical trial is studying how well dornase alfa inhalation solution works compared with a placebo in treating patients with stage III or stage IV head and neck cancer undergoing radiation therapy and chemotherapy.