Frequent Use of Antiseptic Mouthwash May Disrupt Oral Microbiome, Experts Warn

Dental specialists clarify that sporadic use of consumer mouthwashes is unlikely to harm oral or overall health, but prolonged, twice-daily rinsing with prescription-only antiseptics such as chlorhexidine can markedly change the salivary microbiome, make the mouth more acidic and reduce bacteria linked to normal blood pressure. Small trials have observed these shifts, though evidence linking regular mouthwash to diabetes, hypertension or cardiovascular problems is inconclusive.

Over-the-counter rinses containing cetylpyridinium chloride, essential oils, iodine or hydrogen peroxide may have similar effects if used long term, so clinicians advise against continuous use unless treating a specific condition. For cavity-prone patients, fluoride-based rinses are preferred; those with dry mouth or post-procedure restrictions may benefit from therapeutic formulas, while alcohol-free products are safer for sensitive tissues. Ultimately, mouthwash remains optional, with brushing, flossing and professional cleanings as the primary defenses.