Drug interactions
Isosorbide dinitrate + Methylergonovine
Severity: Major
Isosorbide dinitrate and Methylergonovine: major interaction.
Last updated
For healthcare professionals — reference only. This page is a brief summary, not medical advice and not a substitute for official labeling or clinical judgement. Always verify before prescribing or dispensing.
Summary
Methylergonovine is a vasoconstrictor that can oppose the antianginal and vasodilator effects of nitrates. Ergot-induced coronary vasospasm may precipitate angina and may raise blood pressure.
What this interaction means in plain words
Isosorbide dinitrate and Methylergonovine can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for.
Why it happens
Pharmacodynamic antagonism: ergot vasoconstriction opposes nitrate vasodilation.
What to do
Avoid where possible, especially in patients with coronary disease. If methylergonovine is essential, monitor blood pressure and chest pain closely.
What to ask your pharmacist
- Does the benefit of taking both outweigh the risk in my case?
- Do I need any blood test, ECG or other check while on both?
- What early warning signs should I watch for, and what should I do if they appear?
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Other interactions of Isosorbide dinitrate
- Avanafil + Isosorbide dinitrate Contraindicated
- Isosorbide dinitrate + Riociguat Contraindicated
- Isosorbide dinitrate + Sildenafil Contraindicated
- Isosorbide dinitrate + Tadalafil Contraindicated
- Isosorbide dinitrate + Vardenafil Contraindicated
- Ergotamine + Isosorbide dinitrate Major
Frequently asked questions
Can I take Isosorbide dinitrate with Methylergonovine?
MediHelp rates the interaction as major. Isosorbide dinitrate and Methylergonovine can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for. Methylergonovine is a vasoconstrictor that can oppose the antianginal and vasodilator effects of nitrates. Ergot-induced coronary vasospasm may precipitate angina and may raise blood pressure.
How serious is the interaction between Isosorbide dinitrate and Methylergonovine?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid where possible, especially in patients with coronary disease. If methylergonovine is essential, monitor blood pressure and chest pain closely.
What other medicines interact with Isosorbide dinitrate?
MediHelp also lists interactions of Isosorbide dinitrate with, for example, Avanafil, Riociguat, Sildenafil. The full list is on the Isosorbide dinitrate page.
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