In order to observe the clinical efficacy of Zhitong Rushen decoction by oral administration and retention enema for chronic ulcerative colitis due to dampness-heat mixed with blood stasis. Sixty-two cases with chronic ulcerative colitis were randomly divided into two groups: control group ( n =30) and treat- ment group( n =32). Oral sulfasalazine was given to control group as well as metronidazole and gentamicin by enema. Zhitong Rushen decoction was given to treatment group orally and combined with retention ene- ma. The results showed t...