Drug interactions
Methylene blue + Naratriptan
Severity: Major
Methylene blue and Naratriptan: 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 MAO-A inhibitor and can precipitate serotonin syndrome with serotonergic drugs. Naratriptan is not mainly cleared by MAO, so the concern is mostly pharmacodynamic. The regulatory warning still applies to the whole serotonergic class.
What this interaction means in plain words
Methylene blue and Naratriptan 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 raises serotonin levels, adding to the 5-HT1B/1D agonism of the triptan.
What to do
Avoid the combination where possible. If methylene blue is urgently needed, withhold naratriptan, monitor for serotonin toxicity, and do not resume 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 Naratriptan
- Almotriptan + Naratriptan Contraindicated
- Dihydroergotamine intranasal + Naratriptan Contraindicated
- Dihydroergotamine + Naratriptan Contraindicated
- Eletriptan + Naratriptan Contraindicated
- Ergoloid mesylates + Naratriptan Contraindicated
- Ergotamine + Naratriptan Contraindicated
Frequently asked questions
Can I take Methylene blue with Naratriptan?
MediHelp rates the interaction as major. Methylene blue and Naratriptan 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 MAO-A inhibitor and can precipitate serotonin syndrome with serotonergic drugs. Naratriptan is not mainly cleared by MAO, so the concern is mostly pharmacodynamic. The regulatory warning still applies to the whole serotonergic class.
How serious is the interaction between Methylene blue and Naratriptan?
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, withhold naratriptan, monitor for serotonin toxicity, and do not resume until 24 hours after the last methylene blue dose.
What other medicines interact with Naratriptan?
MediHelp also lists interactions of Naratriptan with, for example, Almotriptan, Dihydroergotamine intranasal, Dihydroergotamine. The full list is on the Naratriptan page.
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