Drug interactions
Palonosetron + Protriptyline
Severity: Moderate
Palonosetron and Protriptyline: 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
Protriptyline is a tricyclic antidepressant that raises serotonin and norepinephrine levels. With palonosetron there is a small theoretical risk of serotonin syndrome.
What this interaction means in plain words
Palonosetron and Protriptyline 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 effect; not well established.
What to do
Monitor for agitation, tremor, clonus and hyperthermia, especially after starting or increasing doses. Stop the agents if serotonin syndrome is suspected.
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
Frequently asked questions
Can I take Palonosetron with Protriptyline?
MediHelp rates the interaction as moderate. Palonosetron and Protriptyline 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. Protriptyline is a tricyclic antidepressant that raises serotonin and norepinephrine levels. With palonosetron there is a small theoretical risk of serotonin syndrome.
How serious is the interaction between Palonosetron and Protriptyline?
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, clonus and hyperthermia, especially after starting or increasing doses. Stop the agents if serotonin syndrome is suspected.
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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