After food poisoning, diarrhea should be treated differently according to different situations. After food poisoning, if the diarrhea is not too serious, you can drink water or replenish fluids appropriately, because after food poisoning, diarrhea can expel the poison, which is conducive to detoxification. However, diarrhea after food poisoning can lead to dehydration, which should be treated effectively. Diarrhea can be treated by antispasmodic, adjusting intestinal function and protecting the gastrointestinal mucosa, etc. The medicines used include omeprazole, montelukast, belladonna tablets or 654-2 tablets, etc. In addition, patchouli can be used to treat diarrhea. In addition, the use of Chinese medicinal preparations such as Huo Xiang Zheng Qi Pills and Huo Zi Li Zhong Wan can also play a good role in regulating diarrhea. If the diarrhea caused by food poisoning is due to infection, antibiotics should be used to treat the diarrhea caused by bacterial food poisoning.