If the patient has periodontitis and wants to take western medicine orally, he may take metronidazole or ornidazole or tinidazole, or amoxicillin or cefuroxime axetil tablets, or acetylspiramycin or roxithromycin. If there is periodontitis, comprehensive periodontal treatment, tooth washing, scaling, and root surface leveling are essential. If periodontitis is serious, periodontal flap surgery, gingival surgery and other surgical treatments may also be required. If the teeth are loose, it may be necessary to have loose teeth fixation treatment, or even tooth extraction treatment. After tooth extraction, denture repair is required. Patients with periodontitis should pay attention to oral hygiene, use dental floss, dental floss stick and other tools to clean the crevices, use toothbrush to brush the teeth, and reduce the attachment of plaque microorganisms, soft dirt, etc. in the mouth. The above scheme is only for reference. Please use the specific drugs under the guidance of professional doctors according to your own conditions.