Corsodyl Mint gum disease treatment mouthwash contains the active ingredient chlorhexidine digluconate which is an antibacterial agent that reduces the formation of dental plaque. The mouthwash is designed 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 and manage oral thrush and denture sore mouth.