A Study Study to Investigate the Effect on QT/QTc Interval of Moxifloxacin After a Single Dose in Healthy Male Subjects

Inclusion Criteria: * healthy male subject aged 20 to 40 at screening * subjects who have weight over 50 kg with ideal body weight range of +- 20% * subjects who decide to participate voluntarily and write a informed consent form Exclusion Criteria: * subjects who have acute illness within 28 days of investigational drug administration * subjects who have clinically significant disease of cardiovascular, respiratory, renal, endocrinological, hematological, gastrointestinal, neurological(central nervous system), psychiatric disorders or malignant tumor * subjects who have determined not eligible by screening test (medical history, physical examination, 12-lead ECG, laboratory test, etc) within 28 days of study start * clinically significant allergic disease (except for mild allergic rhinitis) * systolic blood pressure\>= 140 mmHg, diastolic blood pressure \>= 90 mmHg, heart rate \> 100 bpm or \< 50 bpm * result of 12-lead electrocardiogram includes : * QTcF \> 450 msec * PR interval \> 200 msec or \<110msec * Evidence of second- or third-degree atrioventricular (AV) block * Pathologic Q waves (defined as Q-wave \> 40 msec or depth \> 0.5 millivolt * Evidence of ventricular pre-excitation, left bundle branch block (LBBB), right bundle branch block (RBBB) * Intraventricular conduction delay with QRS \> 120 msec * risk of Torsade de pointes such as long QT syndrome, family history of sudden death, heart failure, hypokalemia * Subjects considered unsuitable for inclusion by the investigator