Drug interactions
Amitriptyline + Conivaptan
Severity: Minor
Amitriptyline and Conivaptan: minor 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
Conivaptan is a CYP3A4 inhibitor and may increase amitriptyline exposure, although CYP3A4 is only one of several pathways. Higher levels could add to anticholinergic, sedative, and cardiac effects. Conivaptan is given only for a short course.
What this interaction means in plain words
Amitriptyline and Conivaptan have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Why it happens
Inhibition of CYP3A4-mediated amitriptyline metabolism.
What to do
Monitor for increased tricyclic adverse effects such as sedation, tachycardia, and anticholinergic symptoms during the infusion. Adjust the amitriptyline dose if toxicity occurs.
What to ask your pharmacist
- Is there anything I should notice while taking both?
- Do I need to tell my doctor at the next visit?
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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 Conivaptan?
MediHelp rates the interaction as minor. Amitriptyline and Conivaptan have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Conivaptan is a CYP3A4 inhibitor and may increase amitriptyline exposure, although CYP3A4 is only one of several pathways. Higher levels could add to anticholinergic, sedative, and cardiac effects. Conivaptan is given only for a short course.
How serious is the interaction between Amitriptyline and Conivaptan?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor for increased tricyclic adverse effects such as sedation, tachycardia, and anticholinergic symptoms during the infusion. Adjust the amitriptyline dose if toxicity occurs.
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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