Diarrhea after ketogenic diet can be treated with medicines under doctor’s guidance, such as montelukast, pivoxyl bromide tablets, belladonna sulfadiazine tablets and so on. 1. Montelukast: it is a kind of medicine mainly for treating diarrhea, which can cover the localization of gastrointestinal tract, can effectively treat diarrhea with comprehensive protection of gastrointestinal mucosa, and also used for treating discomfort caused by esophageal, gastric, and duodenal diseases and other diseases. 2. Pivobromine Tablets: It can treat symptoms such as abdominal pain, diarrhea or uncomfortable bowel movement, and is a kind of drug that regulates the ability of gastrointestinal peristalsis, and can be used to treat functional gastrointestinal diseases or irritable bowel syndrome. 3. Belladonna Sulfadiazine Tablets: it is a kind of antibacterial and antispasmodic drug, mainly used for the treatment of chronic bacillary dysentery or pathogenic enteritis caused by dysentery bacillus, such as diarrhea, abdominal pain, diarrhea and so on. Ketogenic diet after diarrhea, should stop taking this method in time, if repeated diarrhea, it is recommended to timely hospital consultation, during the period of attention to avoid spicy and irritating foods.