Sevikar HCT is a combination medication used in the treatment of high blood pressure (hypertension), which combines three active ingredients: olmesartan medoxomil, amlodipine, and hydrochlorothiazide. Olmesartan medoxomil belongs to a class of drugs known as angiotensin receptor blockers (ARBs) and works by relaxing blood vessels, allowing blood to flow more easily. Amlodipine is a calcium channel blocker that helps to lower blood pressure by relaxing the muscles of your heart and blood vessels. Hydrochlorothiazide is a thiazide diuretic (water pill) that helps prevent your body from absorbing too much salt, which can cause fluid retention. By combining these three medications, Sevikar HCT effectively lowers blood pressure, reducing the risk of strokes, heart attacks, and kidney problems. It is typically prescribed when treatment with individual components does not adequately control blood pressure.