Isosorbide mononitrate — Uses, Dosage, Side Effects & Safety

Drug class: Nitrate vasodilator (antianginal agent)

Overview

Isosorbide mononitrate is a prescription medication used to prevent chest pain (angina) caused by heart disease. It works by relaxing and widening blood vessels, making it easier for blood and oxygen to reach the heart. This helps reduce the frequency and severity of angina attacks, but it is not intended for immediate relief of chest pain once it starts. Patients should take isosorbide mononitrate regularly as prescribed, even if they feel well. It is important not to stop taking this medication suddenly without consulting a healthcare provider, as this can worsen chest pain or increase the risk of a heart attack. Always follow your doctor's instructions for dosing and timing.

Therapeutic uses

  • Prophylaxis of angina pectoris
  • Long-term management of angina pectoris
  • Treatment of chronic stable angina

Common side effects

  • Headache
  • Dizziness
  • Lightheadedness
  • Flushing
  • Nausea
  • Hypotension
  • Syncope

Frequently Asked Questions about Isosorbide mononitrate

What is isosorbide mononitrate used for?

It is used to prevent angina (chest pain) in people with heart disease. It is not for immediate relief of chest pain once it starts.

How does isosorbide mononitrate work?

It relaxes and widens blood vessels, allowing more oxygen-rich blood to reach the heart, which helps prevent chest pain.

Can I stop taking isosorbide mononitrate suddenly?

No, stopping suddenly can worsen chest pain or increase the risk of a heart attack. Always consult your doctor before making changes.

What should I do if I miss a dose?

Take the missed dose as soon as you remember, unless it is almost time for your next dose. Do not double up doses.

Are there foods or drinks I should avoid?

Avoid alcohol, as it can increase side effects like dizziness or fainting.

Can I take isosorbide mononitrate with erectile dysfunction medications?

No, combining these can cause dangerously low blood pressure. Always tell your doctor about all medications you take.

What are the most common side effects?

Headache, dizziness, and flushing are common. These often improve with continued use.

Educational information only. Always consult a qualified healthcare professional before starting, stopping, or changing any medication.