Olmesartan ester hydrochlorothiazide tablets are mainly used for the treatment of high blood pressure, but not for the initial treatment of high blood pressure. Olmesartan ester hydrochlorothiazide tablets belong to a combination of antihypertensive drugs, which are synthesized from hydrochlorothiazide and olmesartan ester. Olmesartan ester is an angiotensin II receptor antagonist and hydrochlorothiazide is a thiazide diuretic. Olmesartan ester and hydrochlorothiazide form a combination that has a synergistic effect on lowering blood pressure, and also reduces the risk of hypokalemia with hydrochlorothiazide. Adverse reactions such as nausea, hyperuricemia, dizziness, upper respiratory tract infections, chest pain, back pain, headache, and urinary tract infections may occur with the use of this medication, and the symptoms are usually mild and may disappear on their own after discontinuing the medication. People who are allergic to the ingredients contained in this product need to be prohibited. Due to the presence of hydrochlorothiazide, anuric patients or those who are allergic to other sulfonamides need to be prohibited. This product should not be used in combination with Agilent in diabetic patients. In addition, patients are advised to use Olmesartan Hydrochlorothiazide Tablets under the supervision of a doctor and not for private use.