Antihypertensive drugs to eat half a tablet at a time are angiotensin-converting enzyme inhibitors, angiotensin II receptor antagonists, β-blocker drugs, such as captopril, valsartan, metoprolol and so on. 1. Angiotensin-converting enzyme inhibitors: commonly used are captopril, enalapril, benadryl, etc. The drug is a short-acting antihypertensive drug, with fast onset of action, suitable for urgent antihypertensive treatment of patients with hypertension, so it can be taken half a tablet at a time. 2. Angiotensin II receptor antagonist: common valsartan, irbesartan, olmesartan ester tablets, etc., is a long-acting blood pressure lowering drugs, taking half a tablet can also be more stable control of blood pressure, you can take half a tablet at a time. 3. β-blocker class: commonly used drugs are atenolol, metoprolol, etc., can effectively reduce blood pressure, slow down the heart rate and myocardial oxygen consumption, taking half a tablet can also be effective in controlling the patient’s cardiac arrhythmia, so you can take half a tablet at a time. Antihypertensive drugs are recommended to be taken under the guidance of a doctor, and the dosage should be in accordance with the doctor’s instructions, if there is any discomfort, please consult a doctor in a timely manner.