Xerotin Mouth Moisturiser Spray Xerotin Mouth Moisturiser Spray is a ready to use artificial saliva substitute to relieve the symptoms of dry mouth. Dry mouth can be caused by a variety of reasons, e.g. cancer treatment such as radiation therapy can damage salivary glands, resulting in a loss of saliva. Some chemotherapy agents may cause dry mouth & other reasons can range from certain types of medication to surgery in the head & neck area. Saliva moistens the mouth, helps with eating & speaking & also protects against tooth decay & possible infection, therefore it is very important to use a saliva substitute if you are suffering from a dry mouth. Xerotin Mouth Moisturiser Spray is free from gluten, saccharose (fable sugar) & products of animal origin. Xerotin Mouth Moisturiser Spray can be applied several times a day if required. Each bottle usually contains sufficient for 1 week of treatment.