The efficacy of Pentagastrin is to promote the secretion of endogenous factors, pepsin and gastric acid, and its function is to check the function of gastric acid secretion. The commonly used clinical dosage form of Pentagastrin is injection, which belongs to the diagnostic drugs. After injection, it can promote the secretion of endogenous factors, pepsin and gastric acid, and is mainly used for the examination of gastric acid secretion function in clinic. It should be noted that the use of Pentagastrin Injection is prohibited for those who are allergic to any components of the drug, those with severe peptic ulcers, and patients with pancreatic, hepatic, and biliary tract diseases should be cautious in using the drug. Some patients may experience headache, dizziness, nausea, flushing, gastrointestinal cramps, hypotension and other adverse reactions after the use of the drug, at this time should promptly inform the doctor, and follow the doctor’s instructions for appropriate treatment. Pentagastrin Injection should be used under the guidance of a professional doctor, and patients should not use the drug on their own to avoid adverse reactions.