Which is better alcohol or free mouthwash?

Alcohol-based mouthwashes are more effective than non-alcoholic mouthwashes in reducing the number of bacteria in the mouth and preventing gum disease. Although alcohol content in mouth rinses can help kill some bacteria, it can also dry out your mouth and increase your risk of developing oral yeast infections. The best mouthwashes contain about 0.05 percent chlorhexidine, a chemical that can help prevent and treat gum disease. Talk to your dentist about which type of mouthwash is best for you.