Frequent diarrhea suggests prompt medical attention to identify the cause before medication is administered. Diarrhea can be treated with montelukast, loperamide, bifidobacteria capsules and certain antibiotics. 1. Montelukast: It mainly plays the role of protecting gastric mucosa and absorbing water, and can effectively reduce the symptoms of diarrhea. Occasionally, adverse reactions of constipation and dry stools are seen, with no obvious contraindications. 2. Loperamide: a long-acting antidiarrheal drug, clinically used in the treatment of acute and chronic diarrhea caused by a variety of causes, suitable for long-term treatment of chronic diarrhea. It should not be used in patients with intestinal obstruction, subintestinal obstruction or constipation, and also cannot be used in children with gastrointestinal flatulence and severe dehydration, acute ulcerative colitis and pseudomembranous enteritis caused by broad-spectrum antibiotics, and is contraindicated in children under 1 year of age and pregnant women. 3.Bifidobacteria Live Bacteria Capsules: It can effectively regulate gastrointestinal flora disorders, increase probiotics, inhibit harmful bacteria, and improve diarrhea symptoms. No clear adverse reactions have been observed. It is forbidden for those who are allergic to this product. 4. Antibiotics: If diarrhea is caused by bacterial infection, antibiotics such as cefoperazone and levofloxacin can also be used. The above drugs need to be used under the guidance of a doctor, and should not be used on their own.