At present, more clinical use of quinolone class mainly for norfloxacin and moxifloxacin and levofloxacin, three types of drugs are broad-spectrum antibacterial class, for the treatment of bacterial infections is relatively good effect. If it is a mixed bacterial infection, norfloxacin can be used, but the relative side effects are more, need to be under the guidance of the doctor reasonable use of drugs. If you have urethritis or cystitis, you can take norfloxacin orally to effectively relieve the disease. If you have respiratory tract infections and other conditions, you should choose moxifloxacin, which is more effective and lasts longer for the treatment of respiratory tract infections. Antibacterial drugs are best used rationally under the guidance of a doctor, do not use antibacterial drugs without permission, so as not to cause antibiotic dependence on the body.