Drug interactions
Palonosetron + Sumatriptan
Severity: Moderate
Palonosetron and Sumatriptan: 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
Serotonin syndrome has been rarely reported when 5-HT3 antagonists are used with triptans. The risk is low but clinicians should be aware.
What this interaction means in plain words
Palonosetron and Sumatriptan 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; Sumatriptan belongs to Central Nervous System.
Why it happens
Possible additive serotonergic effects; not firmly established.
What to do
Acceptable when needed; counsel patients and monitor for serotonin syndrome symptoms. Stop both and treat supportively if it 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 Sumatriptan
- Almotriptan + Sumatriptan Contraindicated
- Dihydroergotamine intranasal + Sumatriptan Contraindicated
- Dihydroergotamine + Sumatriptan Contraindicated
- Eletriptan + Sumatriptan Contraindicated
- Ergoloid mesylates + Sumatriptan Contraindicated
- Ergotamine + Sumatriptan Contraindicated
Frequently asked questions
Can I take Palonosetron with Sumatriptan?
MediHelp rates the interaction as moderate. Palonosetron and Sumatriptan 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. Serotonin syndrome has been rarely reported when 5-HT3 antagonists are used with triptans. The risk is low but clinicians should be aware.
How serious is the interaction between Palonosetron and Sumatriptan?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Acceptable when needed; counsel patients and monitor for serotonin syndrome symptoms. Stop both and treat supportively if it 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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