Acidophilus for the Treatment and Prevention of Oral Candidiasis in Patients Undergoing Radiation Therapy

The purpose of this study is to determine the effectiveness of using acidophilus to treat oral candidiasis (thrush) caused by radiation therapy to the head and neck region. This study will conducted in two parts. In the first part of the study, two participants will begin radiation therapy. When signs and symptoms of thrush are noted, such as smooth, creamy, white/yellow coating and/or patches on the tongue and inside of your mouth that are painful, you will begin taking acidophilus capsules twice each day until the last day of radiation therapy. The second part of the study is to determine if acidophilus is effective in preventing oral candidiasis (thrush) during radiation therapy to the head and neck region. In the second part of the study three participants will take acidophilus capsules twice each day beginning on the first day of radiation therapy and continuing until the last day of radiation therapy.