If the symptoms of diarrhea still appear after taking antidiarrheal medication, it is important to consider that it may be caused by improper medication of the patient. Diarrhea is mostly caused by intestinal flora disorders, so the treatment requires the use of drugs that regulate intestinal flora disorders, such as probiotics, which can play a role in inhibiting the reproduction of harmful bacteria, so it can be used to treat diarrhea. If the patient is treated with antidiarrheal drugs alone, it will not play the role of inhibiting harmful bacteria, so it will lead to recurrent diarrhea symptoms, and there may even aggravate the symptoms of diarrhea. Patients with diarrhea caused by clear bacterial or viral infections may also fail to achieve the desired effect when treated with antidiarrheal drugs alone or with antidiarrheal drugs combined with probiotics. It is recommended that if a bacterial infection is clearly present, the patient can be treated with antibiotics to control the infection when necessary, while if a viral infection is present, the patient can be treated with antiviral drugs.