Taking olmesartan hydrochlorothiazide low blood pressure should be promptly reduced, if necessary, stop the drug, monitor blood pressure levels to avoid hypotension. Olmesartan hydrochlorothiazide belongs to the compound preparation, the main ingredients for Olmesartan and hydrochlorothiazide, Olmesartan can inhibit the generation of angiotensin in the body, hydrochlorothiazide belongs to the diuretics, the two combined antihypertensive effect will be significantly increased, the side effects will be reduced. The process of taking olmesartan hydrochlorothiazide should strengthen the monitoring of blood pressure, the emergence of low blood pressure, pay attention to the timely reduction of dosage, or change the antihypertensive effect of the weaker antihypertensive drugs such as olmesartan alone, chlorosartan, etc., and appropriate supplementation of blood volume. If the blood pressure level is still low after dosage reduction, discontinue antihypertensive drug treatment if necessary. Adverse reactions to olmesartan include nausea, vomiting, facial edema, bronchitis, thirst, electrolyte disorders, hypotension, etc. It is contraindicated in patients with type 2 diabetes mellitus who are allergic to the components of the drug, with severe hepatic or renal insufficiency, or who are on oral aliskiren. Oral Olmesartan Hydrochlorothiazide process should pay attention to strengthen the monitoring of blood pressure, the emergence of hypotension, should promptly go to the hospital, under the guidance of the physician to adjust the dose of the drug.