There is no specific drug for colitis, and it needs to be targeted according to the type of colitis, such as ulcerative colitis treated with olsalazine. 1. Ulcerative colitis: can be treated with aminosalicylic acid drugs, such as mesalazine, olsalazine, salicylazosulfapyridine, etc., when the acute attack of colitis, can be used in glucocorticosteroid combination therapy, such as dexamethasone and so on. Aminosalicylic acid drugs may have side effects such as gastrointestinal discomfort and liver damage; glucocorticoid drugs may have side effects such as osteoporosis. 2. Infectious colitis: drug sensitivity test is needed, and according to the type of infecting bacteria, sensitive antibiotics will be used for antibacterial treatment, such as norfloxacin, berberine hydrochloride and so on. Antibiotic drugs may have side effects such as gastrointestinal discomfort. 3. Ischemic colitis: generally need to be taken as soon as possible rehydration therapy, dilate intestinal blood vessels, when infection occurs, antibiotics such as amoxicillin and other combined antibacterial, serious condition may require surgical treatment. Amoxicillin may have side effects such as nausea and bloating. The emergence of colitis, it is recommended to go to the regular hospital in time, according to the cause of the active treatment, avoid self-medication, miss the condition.