Why is mouth wash antiseptic?

Mouthwash is considered antiseptic because it contains antibacterial and antimicrobial agents that help reduce the presence of harmful bacteria in the mouth. Common active ingredients, such as chlorhexidine, cetylpyridinium chloride, or essential oils, work to kill or inhibit the growth of bacteria, thereby preventing oral infections and reducing plaque. This antiseptic action contributes to improved oral hygiene and fresher breath. However, it's important to use mouthwash as a complement to regular brushing and flossing, not a substitute.