There is no such thing as the most effective medication for treating low blood pressure, only the one that works best for the patient. Low blood pressure may be associated with decreased blood volume, vasodilatation and other factors. Patients can be treated with fludrocortisone, octreotide, acarbose and other drugs. 1. Decreased blood volume: diarrhea, vomiting, and excessive diuresis may lead to decreased blood volume hypotension, which can be treated with volume expanders such as fludrocortisone. 2. Vasodilatation: Hypotension caused by vasodilatation can be treated with vasoconstrictors such as octreotide, and acarbose can be used to reduce blood flow in the gastrointestinal tract and increase blood pressure. It is recommended that patients go to the hospital as soon as possible, under the guidance of the doctor to choose the appropriate medication, is strictly prohibited to use their own medication to prevent the impact of the therapeutic effect.