The correct spelling of acel is ACEI, and there are many antihypertensive drugs in the ACEI class, such as captopril and enalapril. ACEI class antihypertensive drugs refer to angiotensin-converting enzyme inhibitor class antihypertensive drugs, which are widely used clinically, including captopril, enalapril, benazepril, movellipril, zofenopril, cilazapril, quinapril, ramipril and so on. It is suitable for the treatment of hypertension, cardiac insufficiency and myocardial infarction, etc. It has the effect of lowering blood pressure, and can also delay and reverse ventricular remodeling, thus preventing the further development of myocardial hypertrophy. It can also improve endothelial function and cardiac function, which has the effect of protecting the heart and reducing the occurrence of arrhythmia. Dry cough, angioedema, electrolyte disorders, renal function abnormalities and other adverse reactions can occur in some patients after use. Hyperkalemia, renal artery stenosis, allergy to such drugs, pregnant and lactating women are prohibited. Patients who want to use ACEI antihypertensive drugs, it is recommended to go to a regular hospital, consult a professional doctor, cooperate with the doctor to complete the relevant examination, to avoid blind treatment.