Hey, excessive starch intake, gastroesophageal reflux disease, pancreatitis, liver disease, serotonin syndrome, oral ulcers, and oral infections. due to decreased clearance of saliva include infections such as tonsillitis, retropharyngeal and peritonsillar abscesses, epiglottitis,  Treatment of hypersalivation should be directed toward the underlying cause. Some patients find relief with use of mouthwash and tooth brushing, which might have a drying effect.