 Since there is a high prevalence in the usage of traditional Chinese herbal medicine in Taiwan, this study examines the frequency of patients using herbal medicine whose initial diagnosis in the emergency department ED is acute non viral hepatitis. We, the researchers at National Taiwan University Hospital, then correlate if the cause of hepatitis is related to the use of these herbal drugs by taking a detailed history of medication or herbs used and by verifying the contents by chemical analysis of the medications used. To our knowledge, this is the first study in examining the relationship between non viral hepatitis and the use of herbal drugs prior to arriving at the ED. We expect to prove adverse effects of these substances, especially hepatitis, is the cause for requiring emergency care. 