Enalapril belongs to the angiotensin-converting enzyme inhibitor class of antihypertensive drugs, which can be used in the treatment of essential hypertension. Enalapril is a long-acting angiotensin-converting enzyme inhibitor, which can reduce peripheral vascular resistance and increase renal blood flow, thus playing a role in lowering blood pressure. The drug also has an organ-protective effect, especially for the treatment of primary hypertension combined with diabetes, left ventricular hypertrophy, heart failure, acute myocardial infarction. Specific drugs and other dosages are recommended to follow the doctor’s instructions. Enalapril can cause cough, low blood pressure, red face and other adverse reactions, if any discomfort promptly consult a doctor. Allergic to the drug, combined with renal artery stenosis, pregnant women and other prohibited, the drug should be used under the guidance of a physician.