Xerostom Mouthwash 250ml with Saliactive. Lack of saliva facilitates microbial imbalance in the mouth leading to infections. Xerostom Mouthwash creates a protective shield against bacteria. It is anti-irratant and a decongestant and its propoties repair and act as a painkiller to the areas affected by mucositis, as well as xerostomia or dry mouth. Use Xerostom Mouthwash whenever you feel your saliva thickening.