Oxytetracycline tablets can treat diarrhea. It is a broad-spectrum antibacterial drug that can be used to treat dysentery, trachoma, conjunctivitis, and purulent skin infections, and can also be used to treat intestinal infections. In clinical practice, due to the side effects of oxytetracycline, oxytetracycline is not used to treat diarrhea as much as possible. Diarrhea refers to a significant increase in the number of bowel movements beyond the usual customary frequency, thin stools, increased water, and undigested food or pus and blood mucus, and vomiting, nausea, and abdominal pain in patients with serious conditions. If it is caused by gastrointestinal disorders, it can be regulated from the diet. If the diarrhea is serious, it is best to go to the gastroenterology department of the hospital for the necessary tests to clarify the cause and then carry out medication and other treatments.