Eritel CH 80 Trio Tablet is a combination antihypertensive medication containing Telmisartan 80 mg, Amlodipine 5 mg, and Chlorthalidone 12.5 mg. This formulation is indicated for the management of hypertension, particularly in patients requiring multiple agents to achieve optimal blood pressure control. Telmisartan, an angiotensin II receptor blocker (ARB), works by inhibiting the vasoconstrictive effects of angiotensin II, thereby reducing peripheral vascular resistance. Amlodipine, a calcium channel blocker, facilitates vasodilation by inhibiting calcium influx into vascular smooth muscle cells, contributing to decreased systemic vascular resistance and lowered blood pressure. Chlorthalidone, a thiazide-like diuretic, promotes natriuresis and diuresis, reducing plasma volume and subsequently lowering blood pressure. The combination of these three agents offers a synergistic effect, addressing multiple pathophysiological mechanisms involved in hypertension. Eritel CH 80 Trio Tablet is typically administered once daily, with dosage adjustments based on clinical response and tolerability. It is essential to monitor renal function, electrolytes, and blood pressure periodically during therapy. Contraindications include hypersensitivity to any component, severe renal or hepatic impairment, and pregnancy. This combination therapy enhances patient compliance by reducing pill burden while providing effective blood pressure control.