Any medicine for diarrhea will have certain side effects. Depending on the cause and condition, current medications for diarrhea include antidiarrheal drugs such as montelukast, antibiotics such as ofloxacin, and antispasmodic drugs such as scopolamine. 1. Antidiarrheal drugs: Montelukast is a kind of antidiarrheal drug, used to stop diarrhea after excluding other serious organic diseases. It is suitable for almost all people, but after a large number of long-term use, it is easy to cause side effects such as dry stools and constipation. 2. Antibiotics: If the patient’s symptoms are serious, accompanied by abdominal pain, fever, blood leukocytosis, etc., then it is necessary to add antibiotics, such as ofloxacin, piperacillin, amoxicillin and so on. If there is very severe diarrhea then stool culture is needed and appropriate antibiotics will be selected according to the culture results. However, some patients may have allergies, liver and kidney function damage, intestinal flora disorders and other side effects after application. 3. Antispasmodic drugs: If diarrhea is accompanied by severe abdominal pain, you can choose antispasmodic drugs, such as scopolamine. Its side effects include dry mouth, red face, blurred vision, etc., and rarely rapid heartbeat, urination difficulties. Diarrhea patients should consult a medical professional for treatment in a timely manner, do not blindly apply antidiarrheal drugs, so as not to cover up the condition, in addition to any drug has certain side effects, it is recommended to use under the guidance of a doctor.