Drug interactions
Dihydroergotamine intranasal + Isocarboxazid
Severity: Major
Dihydroergotamine intranasal and Isocarboxazid: 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
Intranasal dihydroergotamine has serotonergic agonist and vasoconstrictor activity, and combining it with an MAOI may increase the risk of serotonin toxicity and hypertension. Clinical reports are limited but the combination is advised against.
What this interaction means in plain words
Dihydroergotamine intranasal and Isocarboxazid 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
Additive serotonergic and vasoconstrictive effects with MAO inhibition reducing monoamine breakdown.
What to do
Avoid the combination and use an alternative migraine therapy. If unavoidable, monitor blood pressure and for serotonin syndrome symptoms.
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 Isocarboxazid
- 5-HTP + Isocarboxazid Contraindicated
- Amitriptyline + Isocarboxazid Contraindicated
- Amobarbital + Isocarboxazid Contraindicated
- Amoxapine + Isocarboxazid Contraindicated
- Apraclonidine + Isocarboxazid Contraindicated
- Atomoxetine + Isocarboxazid Contraindicated
Frequently asked questions
Can I take Dihydroergotamine intranasal with Isocarboxazid?
MediHelp rates the interaction as major. Dihydroergotamine intranasal and Isocarboxazid 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. Intranasal dihydroergotamine has serotonergic agonist and vasoconstrictor activity, and combining it with an MAOI may increase the risk of serotonin toxicity and hypertension. Clinical reports are limited but the combination is advised against.
How serious is the interaction between Dihydroergotamine intranasal and Isocarboxazid?
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 the combination and use an alternative migraine therapy. If unavoidable, monitor blood pressure and for serotonin syndrome symptoms.
What other medicines interact with Isocarboxazid?
MediHelp also lists interactions of Isocarboxazid with, for example, 5-HTP, Amitriptyline, Amobarbital. The full list is on the Isocarboxazid page.
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