Medicines for diarrhea are often categorized into medicines such as opioids and their derivatives, astringent protectants and adsorbents. 1. Opioids and their derivatives: these drugs can inhibit intestinal peristalsis, slow down the speed of food propulsion, so that the water is fully absorbed, to achieve the effect of stopping diarrhea. Commonly used drugs are loperamide hydrochloride, compound camphor tincture, phenethylpiperidine and so on. 2. Astringent protective agent: this kind of drug has adsorption effect, can be absorbed by bacteria, viruses, etc., to prevent it from damaging the intestinal mucosa or being absorbed by the intestinal mucosa. Commonly used drugs are medicinal charcoal, white clay and so on. 3. Adsorbent: this kind of drugs can make the intestinal mucosa free from other stimuli, with protective effect, and the commonly used drugs are tannin, bismuth subcarbonate and so on. 4. Others: while drugs such as Bacillus licheniformis live bacteria, Lactasexan, Bifidobacterium bifidum live bacteria capsule, etc., can be used to treat diarrhea. It is recommended that patients with diarrhea, timely medical treatment, under the guidance of the doctor reasonable use of medication.