Drug interactions
Citalopram + Palonosetron
Severity: Moderate
Citalopram and Palonosetron: 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
Rare cases of serotonin syndrome have been described when 5-HT3 antagonists are used with SSRIs. Citalopram also prolongs the QT interval, adding a theoretical arrhythmia concern.
What this interaction means in plain words
Citalopram and Palonosetron 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.
Citalopram belongs to Central Nervous System; Palonosetron belongs to Gastrointestinal Tract.
Why it happens
Possible additive serotonergic effects, plus additive QT prolongation potential.
What to do
Monitor for serotonin syndrome symptoms and consider an ECG if other QT risk factors are present. Stop the offending drugs and give supportive care if toxicity 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 Citalopram
- Cisapride + Citalopram Contraindicated
- Citalopram + Dronedarone Contraindicated
- Citalopram + Escitalopram Contraindicated
- Citalopram + Isocarboxazid Contraindicated
- Citalopram + Methylene blue Contraindicated
- Citalopram + Phenelzine Contraindicated
Frequently asked questions
Can I take Citalopram with Palonosetron?
MediHelp rates the interaction as moderate. Citalopram and Palonosetron 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. Rare cases of serotonin syndrome have been described when 5-HT3 antagonists are used with SSRIs. Citalopram also prolongs the QT interval, adding a theoretical arrhythmia concern.
How serious is the interaction between Citalopram and Palonosetron?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor for serotonin syndrome symptoms and consider an ECG if other QT risk factors are present. Stop the offending drugs and give supportive care if toxicity 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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