Taking metformin diarrhea, may be the adverse reaction caused by the drug, the symptoms are mild can recover on their own, do not need special treatment. If the diarrhea is more serious, accompanied by vomiting, abdominal pain and other symptoms, it is necessary to take antidiarrheal drugs under the guidance of a professional doctor to improve the discomfort caused by diarrhea. 1. Mild symptoms: If you have diarrhea after taking metformin, the symptoms are mild and not accompanied by other uncomfortable symptoms, you can usually recover on your own without taking treatment measures. 2. Serious symptoms: If the diarrhea after taking Metformin is more serious, and may be accompanied by obvious vomiting, abdominal pain and other symptoms, we should stop taking Metformin in time, and take antidiarrheal medicines, such as montelukast, under the guidance of professional doctors. If the patient also combined with the infection, need to be under the guidance of the doctor anti-infection treatment. Metformin is a hypoglycemic drug, nausea, vomiting, hypoglycemia, headache, fatigue and other adverse reactions may occur after taking it, allergy to this drug, severe renal failure, serious infections, trauma and other people are prohibited. If you have diarrhea after taking Metformin, after treatment and recovery, it is recommended to cooperate with a professional doctor to adjust the dose of Metformin, or change to other hypoglycemic drugs.