Chlorhexidine gluconate is a germicidal mouthwash that reduces bacteria in the mouth. Chlorhexidine gluconate oral rinse is used to treat gingivitis (swelling, redness, bleeding gums). Chlorhexidine gluconate is usually prescribed by a dentist. Chlorhexidine gluconate oral rinse is not for treating all types of gingivitis. Use the medication only to treat the condition your dentist prescribed it for. Do not share this medication with another person, even if they have the same gum symptoms you have. Chlorhexidine gluconate may also be used for purposes not listed in this medication guide.