Mouthwash is commonly used for freshening breath, but over-reliance on antibacterial formulations may lead to health issues, particularly hypertension. Dr. Kunal Sood, an anaesthesiologist, warns that these mouthwashes can disrupt beneficial oral bacteria that convert dietary nitrates into nitrites, which are essential for nitric oxide production. Nitric oxide is crucial for maintaining healthy blood flow and regulating blood pressure. Research indicates that even short-term use can reduce salivary nitrite levels and increase systolic blood pressure by approximately 2-3 mmHg. Long-term use, especially more than twice daily, is associated with a higher risk of developing hypertension due to decreased nitric oxide availability. While the effects are generally mild for most, they become significant with frequent use of strong antiseptic mouthwashes. Dr. Sood emphasizes that mouthwash still has its place in dental care, particularly for gum disease and high plaque burden, but caution is advised regarding excessive use.