There are many causes of diarrhea, such as acute gastroenteritis, intestinal flora dysbiosis, intestinal tumors, and hyperthyroidism. There are many drugs for treating diarrhea, commonly used symptomatic drugs, such as oral rehydration salts or intravenous rehydration, microecological agents (Saccharomyces boulardii, etc.), antidiarrheal drugs (montelukast, etc.), and causative drugs, such as antibiotics (norfloxacin, etc.), antithyroxine drugs (methimazole, etc.). 1. Allopathic drugs: (1) Oral rehydration salts or intravenous rehydration: usually used in patients with more severe diarrhea, it can correct water electrolytes as well as acid-base balance disorders. (2) Microecological agents: commonly used drugs include bifidobacteria, Saccharomyces boulardii, etc., which can regulate the intestinal environment. (3) Antidiarrheal drugs: commonly used drugs are montelukast, compound phenethylpiperidine and so on. (4) Antispasmodic and analgesic drugs: those with severe abdominal pain can be given antispasmodic and analgesic drugs, such as scopolamine, atropine, etc. to relieve smooth muscle spasm to relieve pain. 2. Causal treatment drugs: (1) antibiotics: antibiotics can be given to those caused by bacterial infection, such as norfloxacin, amoxicillin, cefaclor and other anti-infective treatment. (2) Antithyroid drugs: Diarrhea caused by hyperthyroidism can be treated with drugs such as methimazole and propylthiouracil. There are many causes of diarrhea, it is recommended to consult a doctor in time to clarify the cause of the disease, symptomatic treatment. You need to follow the doctor’s instructions to use drugs, not self-medication.