Telmisartan & Hydrochlorothiazide Tablets IP are a combination medication used to treat high blood pressure (hypertension) in adults. Telmisartan is an angiotensin II receptor blocker (ARB) that relaxes blood vessels, while hydrochlorothiazide is a thiazide diuretic that helps the body eliminate excess salt and water through urine. Together, they work synergistically to lower blood pressure more effectively than either medicine alone, making this combination especially useful for patients who do not respond adequately to monotherapy.