OLMESAR H is a mix of Hydrochlorothiazide and Olmesartan which has a place with the gathering of drugs called Thiazide diuretics and Angiotensin-II receptor blockers separately. It is shown for the treatment of fundamental hypertension. Fundamental hypertension (otherwise called essential hypertension) is an ailment where the power of the blood applied against the walls of the course remains extremely high, and subsequently it might prompt serious harm to the veins of a few organs, hence causing coronary episode, heart or kidney disappointment, stroke, or even visual deficiency.