Losar Beta-H Tablet is a combination antihypertensive medication containing Losartan 50 mg, Atenolol 50 mg, and Hydrochlorothiazide 12.5 mg. This formulation is indicated for the management of hypertension, particularly in patients requiring multiple agents to achieve optimal blood pressure control. Losartan, an angiotensin II receptor blocker (ARB), works by inhibiting the vasoconstrictive effects of angiotensin II, thereby reducing peripheral vascular resistance. Atenolol, a selective beta-1 adrenergic receptor blocker, decreases heart rate and myocardial contractility, leading to reduced cardiac output and blood pressure. Hydrochlorothiazide, a thiazide diuretic, promotes sodium and water excretion, decreasing plasma volume and peripheral resistance. The combined action of these agents provides a synergistic effect, improving efficacy in resistant hypertension. Losar Beta-H Tablet is typically prescribed when monotherapy or dual therapy is insufficient. It should be used under medical supervision with regular monitoring of blood pressure, renal function, and electrolytes due to the risk of electrolyte imbalance and renal impairment. Caution is advised in patients with diabetes, gout, or hepatic dysfunction. Adverse effects may include dizziness, fatigue, electrolyte disturbances, and potential hypersensitivity reactions. This medication should be taken as directed, with adherence to lifestyle modifications for optimal therapeutic outcomes.