Ask a dentist if symptoms persist or condition worsens after regular use. Children 6 years to under 12 years of age, supervise use. Keep out of reach of children under 6 years of age. Children under 6 years of age, do not use. If more than used for rinsing is accidentally swallowed, get medical help or contact a Poison Control Center right away. In some cases, antimicrobial rinses may cause surface staining to teeth. This is not permanent or harmful, and may be prevented by adequate brushing or removed at your next dental visit..