Kim Na-kyung, an official of the Ministry of Food and Drug Safety, explains the ministry's probe into valsartan on Aug. 6, 2018. (Yonhap)

S. Korea bans sale of 59 drugs used to treat high blood pressure

South Korea's drug safety watchdog said Monday that it has banned Daebong LS Co., a local maker of valsartan, from selling and making the active ingredient meant to treat high blood pressure over a cancer-causing substance in the drug.