Goodbloc LA 40 Tablet SR contains Propranolol 40 mg, a non-selective beta-adrenergic receptor blocker used primarily in the management of cardiovascular conditions. Propranolol exerts its therapeutic effects by competitively blocking beta-1 and beta-2 adrenergic receptors, leading to a decrease in heart rate, myocardial contractility, and blood pressure. This sustained-release formulation ensures a gradual and prolonged drug release, providing consistent plasma concentrations and improving patient compliance through once-daily dosing. Goodbloc LA 40 is indicated for the treatment of hypertension, angina pectoris, cardiac arrhythmias, and for the prevention of myocardial infarction. It is also utilized in managing certain types of tremors, migraine prophylaxis, and hypertrophic subaortic stenosis. Caution is advised in patients with bronchial asthma, diabetes mellitus, and peripheral vascular disease due to potential adverse effects. Common side effects include fatigue, dizziness, bradycardia, and gastrointestinal disturbances. The medication should be administered under medical supervision, with dosage adjustments based on clinical response and tolerability. Abrupt discontinuation is discouraged to avoid exacerbation of angina or precipitating myocardial infarction. Goodbloc LA 40 Tablet SR is contraindicated in patients with sinus bradycardia, heart block greater than first degree, and cardiogenic shock. Regular monitoring of heart rate and blood pressure is recommended during therapy.