The third case is a 25-year-old HIV-negative male patient who was diagnosed with RR-TB and initiated on levofloxacin-kanamycin-delamanid-linezolid-clofazimine. The baseline QTcF-interval was 421 msec but prolonged to 518 msec after 23 days of treatment. No laboratory abnormality was identified and he was not taking any concomitant medications thought to prolong the QT-Interval as well, so, clofazimine was stopped and ECG monitoring continued. The ECG repeated after a week recorded a sinus rhythm with QTcF 463 msec. Monthly ECG recordings were done for the rest of patient's treatment course and no ECG above 500 msec was recorded then after.