Many psychiatric drugs can cause dry mouth, known medically as xerostomia.
Unbeknownst to many doctors, dentists and patients, this side effect can severely increase the risk of tooth decay, fungal infections, gum disease and nutritional problems. The difference was attributed to dry mouth, as the lack of saliva's antibacterial and antiviral properties permits rampant bacterial growth. Additionally, those patients who abate the condition with sugar-containing candy or gum further feed those destructive bacteria. Dry mouth may not be noticeable on initiating a medication, as there may be a gradual decrease in saliva production. Be alert to the possibility of this seemingly innocuous side effect.