Isitri

Isosorbide Dinitrate, the active ingredient in Isitri, is an organic nitrate presented as an injectable solution for intracoronary and intravenous use. It treats angina pectoris, acute heart failure and helps prevent myocardial infarction in appropriate patients.

GNH USA supplies Isitri as a licensed, GDP‑compliant international pharmaceutical supplier serving hospitals worldwide.

Isosorbide dinitrate is employed in cardiovascular conditions that involve myocardial oxygen demand and impaired coronary blood flow.

Angina pectoris: reduces frequency and severity of chest pain episodes. Acute heart failure: improves hemodynamics by decreasing preload and afterload. Myocardial infarction prophylaxis: helps prevent recurrent ischemic events in high‑risk patients.

Common Side Effects: - Headache: throbbing pain often worsened by standing. - Flushing: warmth and redness of the face and neck. - Hypotension: noticeable drop in blood pressure, sometimes with dizziness. - Dizziness or light‑headedness, especially on standing. - Tachycardia: compensatory increase in heart rate. - Nausea or mild gastrointestinal upset.

Serious or Rare Side Effects: - Severe hypotension leading to syncope. - Myocardial infarction precipitated by rapid blood pressure fall. - Allergic reactions such as rash, itching or anaphylaxis. - Methemoglobinemia causing cyanosis and shortness of breath. - Life‑threatening arrhythmias. - Persistent severe headache unresponsive to analgesics.

Before initiating therapy, consider the following precautions: - Blood pressure monitoring: ensure baseline values are adequate to avoid excessive hypotension. - Concomitant nitrate use: avoid combining with other nitrate preparations to prevent additive vasodilation. - Phosphodiesterase‑5 inhibitors: do not use within 24‑48 hours of sildenafil, tadalafil or similar agents. - Anemia or hypovolemia: use cautiously as reduced oxygen‑carrying capacity may worsen symptoms. - Renal or hepatic impairment: dose adjustments may be required based on clinical judgment. - Store at room temperature: keep in original container, protect from moisture and direct sunlight.

Isosorbide dinitrate may interact with several drug classes.

Major Interactions (Avoid): - Phosphodiesterase‑5 inhibitors (e.g., sildenafil, tadalafil): risk of profound hypotension. - Other organic nitrates or nitrites: additive vasodilatory effect. - Guanylate cyclase stimulators: excessive cyclic GMP accumulation. - Alcohol in large amounts: potentiates blood pressure lowering.

Moderate Interactions (Monitor Closely): - Antihypertensive agents (ACE inhibitors, ARBs, calcium channel blockers): may require dose titration. - Diuretics: monitor electrolytes and volume status. - Beta‑blockers: watch for bradycardia and reduced cardiac output.