Fast-acting antidiarrheal drugs can be divided into two categories, one is drugs that inhibit intestinal motility and the other is antidiarrheal absorbents. Antidiarrheal absorbents are more effective for chronic diarrhea, and drugs that inhibit intestinal peristalsis can directly reduce intestinal peristalsis and reduce diarrhea. The most commonly used clinical antidiarrheal drugs are loperamide hydrochloride, norfloxacin, and flavopiridol. In addition to medication to stop diarrhea, you also need to pay attention to more hydration, you can take oral salt rehydration solution. Diarrhea should pay more attention to diet, avoid spicy and stimulating food, avoid greasy and diarrhea inducing food. Eat a light and reasonable diet, and also eat more absorbent foods, such as apples and pomegranates. Patients should not be anxious, as long as they have a reasonable diet, take reasonable medication, pay attention to the diet and take more rest, the symptoms will definitely be relieved. When choosing fast-acting antidiarrheal drugs, make sure to select them according to the disease, so that the effect of symptomatic treatment is better.