Drug interactions
Methylene blue + Zolmitriptan
Severity: Major
Methylene blue and Zolmitriptan: 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
Methylene blue is a potent reversible MAO-A inhibitor, and combining it with serotonergic drugs has caused serotonin syndrome. Zolmitriptan is metabolized partly by MAO-A, so its exposure may also rise. The risk is significant given regulatory warnings on this combination.
What this interaction means in plain words
Methylene blue and Zolmitriptan 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
MAO-A inhibition by methylene blue increases serotonin and reduces zolmitriptan clearance.
What to do
Avoid the combination where possible. If methylene blue is urgently needed, stop zolmitriptan and monitor for serotonin toxicity; do not restart until 24 hours after the last methylene blue dose.
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 Zolmitriptan
- Almotriptan + Zolmitriptan Contraindicated
- Dihydroergotamine intranasal + Zolmitriptan Contraindicated
- Dihydroergotamine + Zolmitriptan Contraindicated
- Eletriptan + Zolmitriptan Contraindicated
- Ergoloid mesylates + Zolmitriptan Contraindicated
- Ergotamine + Zolmitriptan Contraindicated
Frequently asked questions
Can I take Methylene blue with Zolmitriptan?
MediHelp rates the interaction as major. Methylene blue and Zolmitriptan 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. Methylene blue is a potent reversible MAO-A inhibitor, and combining it with serotonergic drugs has caused serotonin syndrome. Zolmitriptan is metabolized partly by MAO-A, so its exposure may also rise. The risk is significant given regulatory warnings on this combination.
How serious is the interaction between Methylene blue and Zolmitriptan?
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 where possible. If methylene blue is urgently needed, stop zolmitriptan and monitor for serotonin toxicity; do not restart until 24 hours after the last methylene blue dose.
What other medicines interact with Zolmitriptan?
MediHelp also lists interactions of Zolmitriptan with, for example, Almotriptan, Dihydroergotamine intranasal, Dihydroergotamine. The full list is on the Zolmitriptan page.
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