There is no western medicine specifically for chronic colitis, and the drugs commonly used in the clinical treatment of chronic colitis include aminosalicylic acid preparations, glucocorticoids, immunosuppressants, antibiotics, and so on. 1. Amino-salicylic acid preparations: for ulcerative colitis in chronic colitis, amino-salicylic acid preparations are preferred, such as mesalazine and sulphadiazine-pyrimethamine. 2. Glucocorticoids: chronic colitis application of aminosalicylic acid preparations is not ideal or acute activity of moderate to severe inflammatory bowel disease, oral prednisone tablets, methylprednisolone and other glucocorticoids. 3. Immunosuppressants: chronic colitis is hormone-dependent or ineffective, or the disease is in remission, interferon and other immunomodulators can be used. 4. Antibiotics: If chronic colitis is caused by or combined with bacterial infection, antibiotics such as ciprofloxacin can be used. The above medications should be directed by a doctor. It is recommended that patients with chronic colitis consult a doctor in a timely manner and receive treatment as soon as possible under the guidance of a professional physician.