What is Corsodyl Alcohol Free Mouthwash? The active ingredient of Corsodyl Mouthwash is chlorhexidine digluconate (alcohol free) which is an antibacterial agent that reduces the formation of dental plaque and is used to: Treat and prevent gum disease (where gums may bleed when brushed) Promote gum healing after dental surgery or treatment Control mouth ulcers Maintain mouth hygiene How to use Corsodyl Alcohol Free Mouthwash Do not swallow and do not use more mouthwash than the label tells you to. Use twice a day. Fill the cap to 10 ml line. Rinse mouth thoroughly for 1 minute then spit out.