ACEI antihypertensive drugs can cause dry cough, ACEI class full name is called angiotensin converting enzyme inhibitors, it is suitable for hypertension combined with coronary artery disease and accompanied by heart failure, myocardial infarction, atrial fibrillation, hypertension combined with diabetes mellitus, accompanied by diabetic nephropathy, urinary protein of the population. ACEI antihypertensive drugs in addition to lowering blood pressure at the same time, also has a cardiovascular protective effect and renal protection, and its adverse effect is to cause irritating dry cough and angioedema. The adverse reaction is to cause irritating dry cough and angioedema, for hyperkalemia, pregnant women and bilateral renal artery stenosis patients are prohibited, for serious renal insufficiency patients need to be used with caution. If the patient is intolerant to the irritating dry cough caused by ACEI antihypertensive drugs, then it can be changed to angiotensin 2 receptor antagonist (i.e., ARB antihypertensive drugs), these two antihypertensive drugs in the lowering of blood pressure at the same time on the cardiovascular and renal protective effect is the same, it can be replaced.