Abstract: Objective To illustrate the side effects of antituberculous agents.Methods The clinincal data of pulmonary tuberculosis patients during 1990～1998 were analyzed.Results Various side effects resulting from antituberculous agents were confirmed in 604 cases (32.7%),liver injury,acoustic nerve injury,blood system injury,gastrointestinal response of them were primary (82.1%).Stopped treatment rate was 14.6%.77% in side effects occurred within 2 months after administration,but the blood system injury occurred after 3 months.Conclusion The side effects of antituberculous agents were common and extensive in distribution,clinical doctors must think highly of the matter.