Hazards of Hydrogen Peroxide Mouthwash

Hydrogen peroxide solution—commonly known as “peroxide”—is an aqueous solution of hydrogen peroxide. The medical-grade hydrogen peroxide used for routine disinfection is frequently applied to cleanse wounds, burns, ulcers, purulent sinuses, and ear discharge, and may also be used as a mouth rinse. So, what are the potential risks associated with using hydrogen peroxide as a mouth rinse?

Risks of Using Hydrogen Peroxide as a Mouth Rinse

When used correctly and strictly according to medical instructions, hydrogen peroxide mouth rinses generally pose no harm to the body. However, improper use—such as using an incorrect concentration or rinsing for excessively long durations—may cause adverse effects, including oral mucosal injury and irritation of the lingual papillae. Specific risks must be assessed on a case-by-case basis. Notably, hydrogen peroxide is a potent oxidizing disinfectant with strong irritant properties. Prolonged or frequent use can generate nascent oxygen and produce a foaming effect, leading to oxidative damage to oral mucosal cells. In severe cases, this may even trigger immune-mediated oral ulcers.

It is essential to use the appropriate concentration when rinsing with hydrogen peroxide. The recommended concentration for oral rinsing is 1.5%. Commercially available hydrogen peroxide solutions typically contain 3% hydrogen peroxide; therefore, they must be diluted by half before use as a mouth rinse. Hydrogen peroxide possesses antiseptic, antibacterial, and anti-inflammatory properties and may be used as a mouth rinse during the acute phase of periodontitis or prior to dental procedures such as tooth extraction or professional teeth cleaning.

When using hydrogen peroxide as a mouth rinse, always follow your physician’s or dentist’s instructions to avoid potential harm to your health. We hope this information is helpful. Wishing you good health and happiness!