Enalapril maleate tablets are long-acting antihypertensive drugs, which have a long-lasting effect, can improve insulin resistance and reduce urine protein, and are very convenient to take and have good compliance. It belongs to the AVEI class of antihypertensive drugs, this class of antihypertensive drugs and Captopril, Fosinopril, Benadryl, Perindopril, Lenopril, Sirapril, this class of antihypertensive drugs, of which Captopril is a short-acting drugs, the other are long-acting antihypertensive drugs. The side effects of these drugs are mainly dry cough, and angioedema; the use of these drugs is strictly prohibited in patients with hyperkalemia, pregnant women, and bilateral renal vascular artery stenosis. It should be used with caution in patients whose blood creatinine exceeds 3mg, and the kidney function should be monitored.