Losar-A Tablet contains a combination of Losartan 50 mg and Amlodipine 5 mg, indicated for the management of hypertension. Losartan is an angiotensin II receptor antagonist that selectively blocks the binding of angiotensin II to the AT1 receptor, thereby inhibiting vasoconstriction and aldosterone secretion, resulting in lowered blood pressure. Amlodipine is a calcium channel blocker of the dihydropyridine class, which inhibits the influx of calcium ions into vascular smooth muscle and cardiac muscle, promoting vasodilation and reducing peripheral vascular resistance. The combined action of Losartan and Amlodipine provides an additive antihypertensive effect, improving blood pressure control in patients inadequately managed by monotherapy. Losar-A is particularly useful in patients with essential hypertension, offering benefits in reducing the risk of stroke, myocardial infarction, and renal complications associated with elevated blood pressure. The medication should be administered once daily, with dosage adjustments based on clinical response and tolerability. Common adverse effects may include dizziness, headache, peripheral edema, and fatigue. Caution is advised in patients with hepatic or renal impairment, and it is contraindicated during pregnancy. Regular monitoring of blood pressure, renal function, and electrolytes is recommended during therapy to ensure safety and efficacy.