Chlorosartan potassium tablets are long-acting drugs, hydrochlorothiazide tablets are not long-acting drugs, medium-acting antihypertensive drugs. 1.Chlorosartan potassium tablets: for angiotensin II receptor antagonist, mainly inhibit the role of angiotensin II receptor to dilate blood vessels, play the role of antihypertensive, chlorosartan potassium oral into the human body, 3 ~ 4 hours or so to reach the peak, the effect of lowering blood pressure can be maintained for 24 hours, it is a long-term antihypertensive drug. Its adverse drug reactions include dizziness, cough, etc. It is contraindicated in pregnant women, lactating women and patients with renal artery stenosis. 2. Hydrochlorothiazide tablets: diuretics, through diuresis to reduce blood volume to lower blood pressure. Oral into the body 2 hours after the onset of action, 4 hours to reach the peak, the duration of action of 6 to 12 hours. 1 day need to be taken twice orally to maintain drug concentration, as a medium-acting antihypertensive drugs. Adverse drug reactions include electrolyte disorders, elevated uric acid, elevated blood glucose, elevated blood lipids, etc. Allergy to the drug, pregnant and lactating women should be cautious. Taking drugs should be under the guidance of a doctor, do not blindly take drugs, so as not to aggravate the condition.