A Study of Patients With Dry Mouth and Sticky Saliva During Radiotherapy

Inclusion Criteria: 1. Subject has provided written informed consent 2. Male or female subjects ≥ 18 years of age 3. Subjects prescribed radiotherapy or chemoradiotherapy as primary treatment for head and neck tumours where one or more parotid glands will receive a significant dose of radiation as judged by the CI or PI during the radiotherapy planning process Exclusion Criteria: 1. Subject is pregnant or breastfeeding 2. Subjects with known allergies to egg, soya, or lanolin (sheep's wool grease) based products 3. Subjects with a history of an autoimmune disease with pre-treatment xerostomia (e.g. Sjögren's syndrome) or other underlying systemic illness known to cause xerostomia independent of prior radiation therapy exposure 4. Subjects who have participated in an investigational medicinal product study within 30 days prior to signing consent 5. Any clinically significant disease or condition that may interfere with the study treatment or outcome of the study (at the discretion of the CI or PI) 6. Subjects who are unable to independently complete the questionnaire or diary 7. Subjects who are judged inappropriate for inclusion in the study by the CI or PI 8. Subjects with head and neck cancer who have had surgery to the primary site. Neck dissection alone is not an exclusion