Using mouthwash in your daily oral hygiene regimen can help decrease your chance of tooth decay. It’s important to choose the right mouthwash or rinse for your specific needs. If you’re dealing with, or showing signs of periodontal disease, a prescription mouthwash may be best. A fluoride rinse will help prevent cavities. Some rinses contain alcohol which can exacerbate a dry mouth. Brushing and flossing should be completed prior to using a mouthwash or rinse. Avoid eating, drinking, or smoking for at least 30 minutes after using mouthwash.