Metronidazole buccal tablets are not to be swallowed and are to be used mainly topically. When there is periodontitis, pericoronitis or gingivitis, it can be placed between the gums and the gingival sulcus for containment. In the case of mouth ulcers, it can be adhered directly to the affected area of the mucosa. Metronidazole buccal tablets are best used after meals, without drinking or eating, and avoid drinking alcohol or using alcoholic beverages while taking the medication. It is not recommended for pregnant or breastfeeding people, or younger children, because it has more side effects. In addition, long-term use is not recommended, long-term may cause oral flora imbalance, causing other infections, such as fungal infections.