Objective To investigate the use of antibiotics and to evaluate the rationality of drug use in one 3A-grade hospital.Methods A retrospective study was conducted,in which 200 adult outpatients' common prescriptions and 120 case histories of discharged patients in this hospital were randomly selected.The investigation of antibacterials for the prescription indicators of the outpatient international prescription indicators for rational drug use and the manifestations of inpatients' non-rational use of drugs,DD...