Drug interactions
Buspirone + Methylene blue
Severity: Major
Buspirone and Methylene blue: major interaction.
Last updated Sources: US FDA label
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 inhibits MAO-A and can precipitate serotonin syndrome when given with serotonergic drugs such as buspirone. Severe cases involve hyperthermia, rigidity, seizures and altered consciousness.
What this interaction means in plain words
Buspirone and Methylene blue 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
Methylene blue inhibits monoamine oxidase A, which raises synaptic serotonin and adds to the serotonergic effect of buspirone.
What to do
Avoid the combination; if methylene blue is urgently needed, stop buspirone and monitor for serotonin toxicity. Buspirone may be restarted 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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References
Other interactions of Buspirone
- Buspirone + Isocarboxazid Contraindicated
- Buspirone + Linezolid Contraindicated
- Buspirone + Phenelzine Contraindicated
- Buspirone + Procarbazine Contraindicated
- Buspirone + Selegiline Contraindicated
- Buspirone + Selegiline transdermal Contraindicated
Frequently asked questions
Can I take Buspirone with Methylene blue?
MediHelp rates the interaction as major. Buspirone and Methylene blue 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 inhibits MAO-A and can precipitate serotonin syndrome when given with serotonergic drugs such as buspirone. Severe cases involve hyperthermia, rigidity, seizures and altered consciousness.
How serious is the interaction between Buspirone and Methylene blue?
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; if methylene blue is urgently needed, stop buspirone and monitor for serotonin toxicity. Buspirone may be restarted 24 hours after the last methylene blue dose.
What other medicines interact with Buspirone?
MediHelp also lists interactions of Buspirone with, for example, Isocarboxazid, Linezolid, Phenelzine. The full list is on the Buspirone page.
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