Drug interactions
Netupitant / palonosetron + Venlafaxine
Severity: Moderate
Netupitant / palonosetron and Venlafaxine: 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
Palonosetron, a 5-HT3 antagonist, has been linked to rare reports of serotonin syndrome when given with serotonergic antidepressants such as venlafaxine. Netupitant also inhibits CYP3A4, which could modestly raise venlafaxine exposure. The overall risk is low but symptoms can be serious if they occur.
What this interaction means in plain words
Netupitant / palonosetron and Venlafaxine 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.
Why it happens
Additive serotonergic effects are proposed, with possible minor CYP3A4 inhibition by netupitant increasing venlafaxine exposure.
What to do
Co-administration is acceptable when needed, but watch for agitation, tremor, hyperreflexia, sweating and fever after dosing. Treat any suspected serotonin syndrome by stopping the serotonergic agents and giving supportive care.
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 Venlafaxine
- Isocarboxazid + Venlafaxine Contraindicated
- Methylene blue + Venlafaxine Contraindicated
- Phenelzine + Venlafaxine Contraindicated
- Procarbazine + Venlafaxine Contraindicated
- Rasagiline + Venlafaxine Contraindicated
- Safinamide + Venlafaxine Contraindicated
Frequently asked questions
Can I take Netupitant / palonosetron with Venlafaxine?
MediHelp rates the interaction as moderate. Netupitant / palonosetron and Venlafaxine 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, a 5-HT3 antagonist, has been linked to rare reports of serotonin syndrome when given with serotonergic antidepressants such as venlafaxine. Netupitant also inhibits CYP3A4, which could modestly raise venlafaxine exposure. The overall risk is low but symptoms can be serious if they occur.
How serious is the interaction between Netupitant / palonosetron and Venlafaxine?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Co-administration is acceptable when needed, but watch for agitation, tremor, hyperreflexia, sweating and fever after dosing. Treat any suspected serotonin syndrome by stopping the serotonergic agents and giving supportive care.
What other medicines interact with Venlafaxine?
MediHelp also lists interactions of Venlafaxine with, for example, Isocarboxazid, Methylene blue, Phenelzine. The full list is on the Venlafaxine page.
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