Valzaar H Tablet 10 is a medication used to treat high blood pressure (hypertension). It combines two active ingredients: valsartan and hydrochlorothiazide. Valsartan is an angiotensin II receptor blocker (ARB) that relaxes and widens blood vessels, while hydrochlorothiazide is a diuretic that helps the body eliminate excess water and salt, further reducing blood pressure.