Listerine Original Antiseptic Mouthwash 500MLJust 30 seconds of rinsing, twice a day. That s all it takes when you use Listerine Original Antiseptic Mouthwash. Sure, it's a little intense. But what else would you expect from the original bold?You ll get 24 hour protection with; Clinically proven health benefits The power to kill germs that lead to bad breath, plaque and gum disease 21% greater gingivitis reduction than merely brushing and flossing alone Was shown in a clinical study to reduce