Perioxidin oral solution contains chlorhexidine. Prevents the formation of dental plaque (which is the main cause of gingivitis). Against plaque, it protects the gums. Mint flavor. After brushing your teeth, rinse your mouth with 15ml of undisturbed mouthwash for 30 to 60 seconds. For best results, do not rinse with water and do not drink or eat for 15 minutes after using the mouthwash.