It is used in the treatment of Hypertension (high blood pressure), works by different mechanisms to provide better control of blood pressure when single or dual therapy is not effective. Cilnidipine is a calcium channel blocker (CCB) and telmisartan is an angiotensin receptor blocker (ARB). They work by widening and relaxing the blood vessels, thereby lowering blood pressure. Metoprolol is a beta blocker that works specifically on the heart to slow down the heart rate.