The duration of taking antibiotics is not clearly defined, and it is generally considered that long-term antibiotic use refers to the continuous and uninterrupted application of antibiotics for more than 2 weeks. Antibiotics are a class of drugs that inhibit or kill pathogens such as bacteria, including penicillins, cephalosporins, quinolones and synthetic antibiotics, etc. Patients need to choose to use them according to the type of infecting bacteria. The time to take antibiotics is related to the type of antibiotic chosen, the disease suffered, the degree of inflammation of the disease, etc. For example, oral penicillins or cephalosporins for respiratory tract infections are usually taken for about 3 days; more serious respiratory tract infections require 1-2 weeks of medication, or even intravenous infusion of antibiotics; taking antibiotics for urinary tract infections requires continued medication for 1 week after the symptoms disappear. However, it is usually considered that taking antibiotics continuously for more than 2 weeks is considered long-term antibiotics, which can lead to the gradual emergence of bacterial resistance in the patient’s body and disorders of the intestinal flora and other consequences. Therefore, if a patient develops a bacterial infection, he or she should choose antibiotics under the guidance of a doctor and stop taking them in a timely manner after the disease is effectively controlled.