Drug interactions
Palonosetron + Zolmitriptan
Severity: Moderate
Palonosetron and Zolmitriptan: moderate 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
Both drugs act on serotonin pathways, and labeling for 5-HT3 antagonists and triptans warns of serotonin syndrome with other serotonergic agents. Documented cases with this pair are rare, and the risk is thought to be low.
What this interaction means in plain words
Palonosetron and Zolmitriptan can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken.
Palonosetron belongs to Gastrointestinal Tract; Zolmitriptan belongs to Central Nervous System.
Why it happens
Possible additive serotonergic effects; the mechanism is not firmly established.
What to do
Counsel the patient to report agitation, tremor, sweating or fever, and monitor after dosing. Stop the drugs and treat supportively if serotonin syndrome develops.
What to ask your pharmacist
- Should I take them at different times of day?
- Does the dose of either medicine need to change?
- Is there anything I should avoid, such as alcohol or certain foods, while on both?
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Other interactions of Palonosetron
- Apomorphine + Palonosetron Contraindicated
- Isocarboxazid + Palonosetron Major
- Palonosetron + Phenelzine Major
- Palonosetron + Tranylcypromine Major
- Almotriptan + Palonosetron Moderate
- Amitriptyline + Palonosetron Moderate
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 Palonosetron with Zolmitriptan?
MediHelp rates the interaction as moderate. Palonosetron and Zolmitriptan can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken. Both drugs act on serotonin pathways, and labeling for 5-HT3 antagonists and triptans warns of serotonin syndrome with other serotonergic agents. Documented cases with this pair are rare, and the risk is thought to be low.
How serious is the interaction between Palonosetron and Zolmitriptan?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Counsel the patient to report agitation, tremor, sweating or fever, and monitor after dosing. Stop the drugs and treat supportively if serotonin syndrome develops.
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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