Nitroglycerin: The Vasodilator for Chest Pain and Heart Conditions
What is Nitroglycerin?
Nitroglycerin is a nitrate vasodilator used for treatment and prophylaxis of angina (chest pain) and for managing heart failure. It relaxes the blood vessels, which allows the heart to receive more oxygen and reduces the heart’s workload. It is also used in rectal fissures to decrease the sphincter tone and intra-anal pressure.
How Nitroglycerin Works
Nitroglycerin works by converting to nitric oxide in the body, which dilates blood vessels and reduces the amount of oxygen required by the heart. This helps relieve symptoms of chest pain and improve blood flow to the heart.
When to Use Nitroglycerin
● Angina: Nitroglycerin is commonly used to treat angina during episodes of chest pain caused by coronary artery disease.
● Heart Failure: It is also used in the management of heart failure to reduce fluid buildup and decrease the heart’s workload.
Dosage
● Adult Dose for Angina: 0.3 mg to 0.6 mg sublingually every 5 minutes for chest pain, up to 3 doses. Orally the initial dose is 2.5-6.5 mg TID, the maximum dosage is 26 mg, four times a day.
● Pediatric Dose: Nitroglycerin is generally not recommended for children unless prescribed for specific conditions under a doctor’s supervision. For heart failure, the initial dose is 0.25-0.5 mcg/kg/min. The dose is titrated based on response. Maximum dose is 10 mcg/kg/min.
Side Effects
● Common Effects: Headache, dizziness, flushing, and low blood pressure.
● Serious Adverse Effects: Severe hypotension, fainting, and reflex tachycardia (an increase in heart rate).
Common Indian brands: Nitrocontin, Nitrolong.