Drug interactions
Palonosetron + Tranylcypromine
Severity: Major
Palonosetron and Tranylcypromine: 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
Tranylcypromine is an irreversible nonselective MAO inhibitor that markedly raises serotonin availability. Adding a 5-HT3 antagonist such as palonosetron may contribute to serotonin syndrome, though reports for palonosetron are limited.
What this interaction means in plain words
Palonosetron and Tranylcypromine 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.
Palonosetron belongs to Gastrointestinal Tract; Tranylcypromine belongs to Central Nervous System.
Why it happens
Additive serotonergic effects on top of irreversible MAO inhibition; the contribution of 5-HT3 antagonists is not firmly established.
What to do
Prefer an antiemetic from another class where possible. If palonosetron is needed, monitor closely for serotonin syndrome after administration.
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 Palonosetron
- Apomorphine + Palonosetron Contraindicated
- Isocarboxazid + Palonosetron Major
- Palonosetron + Phenelzine Major
- Almotriptan + Palonosetron Moderate
- Amitriptyline + Palonosetron Moderate
- Amoxapine + Palonosetron Moderate
Other interactions of Tranylcypromine
- 5-HTP + Tranylcypromine Contraindicated
- Amitriptyline + Tranylcypromine Contraindicated
- Amoxapine + Tranylcypromine Contraindicated
- Atomoxetine + Tranylcypromine Contraindicated
- Benzphetamine + Tranylcypromine Contraindicated
- Brimonidine + Tranylcypromine Contraindicated
Frequently asked questions
Can I take Palonosetron with Tranylcypromine?
MediHelp rates the interaction as major. Palonosetron and Tranylcypromine 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. Tranylcypromine is an irreversible nonselective MAO inhibitor that markedly raises serotonin availability. Adding a 5-HT3 antagonist such as palonosetron may contribute to serotonin syndrome, though reports for palonosetron are limited.
How serious is the interaction between Palonosetron and Tranylcypromine?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Prefer an antiemetic from another class where possible. If palonosetron is needed, monitor closely for serotonin syndrome after administration.
What other medicines interact with Palonosetron?
MediHelp also lists interactions of Palonosetron with, for example, Apomorphine, Isocarboxazid, Phenelzine. The full list is on the Palonosetron page.
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