Oleander juice contains more tannic acid and fiber, so patients may drink too much oleander juice, which may lead to rapid peristalsis and diarrhea symptoms. Generally speaking, the ingredients of oleander juice will be discharged from the body with the metabolism of the body, so the symptoms of diarrhea will be relieved, and there is usually no need to worry too much. First of all, patients with diarrhea after drinking oleander juice can take some water, and if the symptoms are not relieved, they can also take loperamide hydrochloride, colloidal bismuth capsules, etc., which can relieve the symptoms of diarrhea and protect the mucous membrane of gastrointestinal tract. Secondly, patients who have diarrhea after drinking oleander juice also need to consider whether they already have some gastrointestinal diseases. If, after several days, the symptoms of diarrhea still appear repeatedly, even with abdominal pain, nausea, acid reflux, loss of appetite, indigestion and other performance, it is recommended that patients immediately go to the hospital to improve the relevant examination, so as to avoid the gradual aggravation of gastrointestinal diseases, which will increase the treatment difficulty and affect the treatment effect. It has also been shown that the fruit of Oleander has medicinal value and was commonly used in ancient times to help combat indigestion and abdominal pain. Patients with episodic dyspepsia can drink some oleander juice appropriately to promote gastrointestinal digestion to a certain extent. However, patients who have already had diarrhea or have gastrointestinal disorders need to avoid intake of Oleander juice and Oleander fruit to avoid reoccurrence of adverse consequences.