From January 2014 to December 2016, 38 out of 153 inpatients admitted to the Korean Medicine Hospital for more than one month underwent follow-up blood tests to evaluate their liver function levels, and one drug-induced liver injury (DILI) patient was observed. 1. At the time of admission, six (15.8%) of the 38 patients had abnormal alanine aminotransferase (ALT) levels and five of them recovered after hospitalization. 2. At follow-up, two (5.3%) patients had a Council for International Organizations of Medical Science (CIOMS)-based liver injury. One was identified as a liver injury accompanied by pneumonia, and one was judged as a liver injury caused by the drug. 3. The patient had a suspected DILI and completely recovered after 13 days while discontinuing the herbal medication and by using Sanggangunbi-tang (çèå¥è¾æ¹¯). Keywords: drug-induced liver injury (DILI), herb, alanine aminotransferase (ALT), CIOMS, traditional Korean medicine (TKM)