There is no fastest and most effective way to stop diarrhea, according to the cause of the cause of the symptomatic treatment, common causes of diarrhea are intestinal flora dysbiosis, parasitic infections, bacterial infections, irritable bowel syndrome, and so on, you can take probiotics, deworming medicines, antibiotics, antidiarrheal medicines for treatment. 1. Intestinal flora dysbiosis: probiotics can be taken to regulate, such as lactobacillus tablets, bifidobacteria and so on. 2. Parasitic infection: you can take anthelmintic drugs for treatment, such as albendazole, mebendazole and so on. 3. Bacterial infection: you can take cephalosporin and quinolone antibacterial drugs for treatment, such as cefixime, levofloxacin, norfloxacin and so on. 4. Irritable bowel syndrome: generally use comprehensive treatment, which should include psycho-psycho-behavioral intervention therapy, dietary adjustments and drug therapy. Stop diarrhea can take montelukast, loperamide and other drugs for treatment. Diarrhea may also be caused by other reasons, if discomfort occurs, it is recommended to consult a doctor in a timely manner, under the guidance of a doctor to clarify the cause of the disease and targeted treatment, do not take their own medication, so as not to delay the condition.