Can metronidazole gel be used for oral ulcers?

Nov 24, 2022 Source: Cainiu Health
Disease description:

My girlfriend frequently gets mouth ulcers. A friend said metronidazole can treat them. Can metronidazole gel be used for oral ulcers?

Doctor's answer (1)
Dr. Zhang Liwen
Metronidazole gel is the most commonly used oral antibacterial and anti-inflammatory medication, effective in treating periodontal diseases, but shows limited efficacy in treating oral ulcers. The exact pathogenesis of oral ulcers remains unclear. The prevailing view holds that it is a condition caused by genetic, environmental, and immunological factors. Therefore, no specific drug can completely eliminate the condition, and treatment is generally focused on local therapy.