Listerine Mouthwash Cavity Fighter Protect your teeth and strengthen your oral health with Listerine Cavity Fighter Mouthwash. This powerful formula helps prevent cavities, fights germs, and reduces plaque buildup, while reaching areas your toothbrush misses. Enriched with fluoride, it strengthens tooth enamel and keeps your breath fresh for hours. Use it twice daily for a cleaner, healthier mouth and long-lasting protection against cavities.