Cardinor 5 mg Tablet contains Bisoprolol Fumarate, a selective β₁-adrenergic blocker (beta-blocker) manufactured by Labaid Pharmaceuticals Ltd. It is primarily used to manage hypertension (high blood pressure), angina (chest pain), and moderate to severe heart failure by reducing heart rate and the force of heart contractions, thereby lowering blood pressure and reducing the heart's workload.