One study has assessed the use of herbal therapy in addition to conventional treatment. 118 patients with active UC were treated with oral Yukui tang tablets ('decoction for ulcer healing') and herbal decoction enemas, in addition to oral prednisolone 15 mg daily, neomycin and vitamin B for 40 days. Eighty-six control patients who received only low dose prednisolone, neomycin and vitamin B were used for comparison. The remission rates and response rates were 33% and 51%, respectively, in the active group, compared with 17% and 43%, in the control group.[28]