OraCoat XyliMelts Dry Mouth Relief Moisturizing Discs are oral-adhering discs that stick to your teeth or gums to relieve persistent dry mouth symptoms. OraCoat XyliMelts can be used day or night and can last 4-8 hours between applications depending on saliva production (Individual results may vary). OraCoat XyliMelts are made with xylitol, a natural, sugar-free sweetener that helps increase saliva flow and feature patented adhering disc technology to slowly release 550 mg of xylitol to stimulate saliva production over time. while lubricating the mouth the relieve dry mouth symptoms.