About isosorbide mononitra te
Long-acting nitrate vasodilator
Used for
- Prevention of angina (chest pain) due to coronary heart disease
Usual adult dose
Usually 20 mg twice daily, with doses spaced to allow a nitrate-free interval; dosing varies by formulation and prescription.
Common side effects
- Headache
- Dizziness or light-headedness
- Flushing
- Low blood pressure
Important warnings
- Not for treating a sudden angina attack.
- Avoid with sildenafil, tadalafil, vardenafil, or riociguat; blood pressure may fall dangerously.
- Alcohol and blood-pressure medicines can worsen dizziness or low blood pressure.
- Do not stop regular treatment suddenly without medical guidance.
Pregnancy
Use during pregnancy only when clearly needed; human safety information is limited.
Breastfeeding
Information is limited; use only after weighing benefits and potential risks.
Interactions
- Sildenafil, tadalafil, vardenafil, and riociguat can cause severe low blood pressure.
- Other nitrates or nitric-oxide medicines increase blood-pressure-lowering effects.
- Alcohol and medicines that lower blood pressure may increase dizziness or fainting.
AI-generated from general medical knowledge, not from this product's official leaflet. It may be incomplete or out of date. Not medical advice — ask a pharmacist or doctor before making any decision.