Drug interactions
Amitriptyline + Netupitant / palonosetron
Severity: Moderate
Amitriptyline and Netupitant / 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
Palonosetron is a 5-HT3 antagonist, and serotonin syndrome has been reported when such agents are combined with serotonergic antidepressants. Netupitant inhibits CYP3A4 and may modestly increase amitriptyline exposure. The risk is low with short antiemetic courses.
What this interaction means in plain words
Amitriptyline and Netupitant / 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.
Why it happens
Possible additive serotonergic effects, plus netupitant inhibition of CYP3A4 that may raise amitriptyline levels.
What to do
Monitor for agitation, tremor, hyperthermia and other signs of serotonin toxicity, as well as for anticholinergic effects and QT prolongation. Treat any suspected serotonin syndrome by stopping the serotonergic agents.
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 Amitriptyline
- Amitriptyline + Isocarboxazid Contraindicated
- Amitriptyline + Methylene blue Contraindicated
- Amitriptyline + Phenelzine Contraindicated
- Amitriptyline + Pimozide Contraindicated
- Amitriptyline + Procarbazine Contraindicated
- Amitriptyline + Safinamide Contraindicated
Frequently asked questions
Can I take Amitriptyline with Netupitant / palonosetron?
MediHelp rates the interaction as moderate. Amitriptyline and Netupitant / 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. Palonosetron is a 5-HT3 antagonist, and serotonin syndrome has been reported when such agents are combined with serotonergic antidepressants. Netupitant inhibits CYP3A4 and may modestly increase amitriptyline exposure. The risk is low with short antiemetic courses.
How serious is the interaction between Amitriptyline and Netupitant / 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 agitation, tremor, hyperthermia and other signs of serotonin toxicity, as well as for anticholinergic effects and QT prolongation. Treat any suspected serotonin syndrome by stopping the serotonergic agents.
What other medicines interact with Amitriptyline?
MediHelp also lists interactions of Amitriptyline with, for example, Isocarboxazid, Methylene blue, Phenelzine. The full list is on the Amitriptyline page.
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