Vasodilating antihypertensive drugs include angiotensin-converting enzyme inhibitors, angiotensin II receptor antagonists, calcium antagonists, and nitrates. 1. Angiotensin-converting enzyme inhibitors: common drugs include captopril and enalapril. They can cause adverse reactions such as irritating dry cough and angioedema. Hyperkalemia, pregnant women and patients with bilateral renal artery stenosis are prohibited. 2. Angiotensin II receptor antagonist: common drugs are valsartan and chlorosartan. Antihypertensive effect, slow onset of action, durable and smooth. Adverse drug reactions are less, usually does not cause irritating dry cough. Hyperkalemia, pregnant women and patients with bilateral renal artery stenosis are prohibited. 3. Calcium ion antagonist: common drugs nifedipine, nifedipine, etc., can cause increased heart rate, facial flushing, headache, lower limb edema and other adverse reactions. Heart failure, sinus node hypoplasia or heart block patients should not be used. 4. Nitrate drugs: common drugs include nitroglycerin, isosorbide mononitrate, etc., which are mainly used in patients with hypertensive emergencies, and can cause tachycardia, facial flushing, headache and vomiting and other adverse reactions. The above drugs are recommended to be used under the guidance of a doctor, and should not be used blindly on their own, so as not to cause unnecessary damage.