Ismo 20 Tablet contains Isosorbide Mononitrate 20 mg, a nitrate class medication primarily used for the prevention and management of angina pectoris due to coronary artery disease. Isosorbide Mononitrate acts as a vasodilator by relaxing vascular smooth muscle, leading to the dilation of peripheral veins and arteries, which reduces myocardial oxygen demand by decreasing preload and afterload. This mechanism helps alleviate chest pain associated with ischemic heart conditions. Ismo 20 is indicated for the long-term prophylaxis of angina pectoris and is not intended for acute angina attacks. The tablet is typically administered orally once daily, with dosage adjustments based on clinical response and tolerability. Common side effects may include headache, dizziness, hypotension, and flushing, which are generally dose-related and tend to diminish with continued use. Caution is advised in patients with hypotension, severe anemia, or increased intracranial pressure. Ismo 20 should not be used concomitantly with phosphodiesterase inhibitors due to the risk of severe hypotension. Regular monitoring of blood pressure and clinical status is recommended during therapy. Patient adherence to prescribed dosing schedules is essential to maintain therapeutic efficacy and minimize adverse effects.