Mannitol does not contain hormones in it, so it is not a hormone drug. Mannitol is a tissue dehydrating drug, osmotic diuretic and flushing agent, etc.; it can reduce intraocular pressure, and can also be used to assist in the treatment of nephrotic syndrome, cirrhotic ascites, especially in patients with hypoproteinemia; it can also relieve drug overdose or toxic poisoning; and it can also be used to prepare the intestinal tract prior to surgery. Patients using mannitol may experience adverse reactions such as water and electrolyte disturbances, decreased blood volume, chills, fever, dysuria, thrombophlebitis, edema, allergic reactions, dizziness, blurred vision, thirst, and osmotic nephropathy. In addition, patients with acute tubular necrosis and anuria are contraindicated, patients suffering from severe water loss, active intracranial hemorrhage, acute pulmonary edema, and pulmonary stasis are contraindicated, and the efficacy and safety of the drug in pregnant women and children are unclear. If patients need to use mannitol injection, please consult a professional doctor in advance and strictly follow the doctor’s instructions.