Many people think mouthwash is a cure-all for bad breath and cavities, but is it really necessary? Kevin Molldrem DDS explains that while mouthwash freshens breath, it’s not a substitute for brushing and flossing. Some mouthwashes contain alcohol, which can dry out the mouth and worsen bad breath. Antibacterial mouthwashes help fight plaque but should be used as part of a complete oral care routine. Knowing which mouthwash to choose—and how to use it properly—ensures maximum benefits without unwanted side effects.