Periodontitis can be treated with medications such as metronidazole and amoxicillin if you want to use medication after a tooth extraction. But routine generally do not need to use drugs. Periodontitis is an inflammatory disease, generally need to do a good job of local anti-inflammatory treatment, so as not to lead to infection symptoms, there is no strict medication guide, you can use metronidazole, ornidazole, amoxicillin, cefixime and other anti-inflammatory drugs under the guidance of the doctor, can alleviate the symptoms of periodontitis. In order to avoid the infection of the tooth socket after tooth extraction, you can also use roxithromycin, erythromycin and other medications under the guidance of the doctor. Usually need to observe more teeth recovery, need to pay attention to personal oral hygiene after tooth extraction, after 24 hours can be appropriate to brush teeth rinse mouth.