Maduryung Extract, one of herbal medicine was tested for inhibitory effect to alcohol, acetaminophen and d-galactosamine induced hepatitis in rats. The results were as follows. 1. Increaced serum GOT, GPT levels by alcohol were significantly decreased by Maduryung extract.(p<0.01) 2. Maduryung extract decreaced GOT value in acetaminophen induced hepatitis and this effect may be due to increace of GSH level in liver tissue.(p<0.05) 3. Repeat administration of Maduryung extract showed inhibitory effect on s-GOT, s-GPT levels in d-galactosamine induced hepatitis. (p<0.05) According to the above results, it seems that Maduryung could be use as drug for alcohol or drug induced hepatitis treatment.