Drug interactions
Conivaptan + Pazopanib
Severity: Major
Conivaptan and Pazopanib: major interaction.
Last updated Sources: US FDA label
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 strong CYP3A4 inhibitor and may increase pazopanib exposure. This raises the risk of hepatotoxicity, hypertension and QT prolongation.
What this interaction means in plain words
Conivaptan and Pazopanib can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for.
Why it happens
Inhibition of CYP3A4-mediated pazopanib metabolism.
What to do
Avoid the combination if possible, and consider another therapy for hyponatremia. If it must be used, reduce pazopanib to 400 mg daily and monitor for toxicity.
What to ask your pharmacist
- Does the benefit of taking both outweigh the risk in my case?
- Do I need any blood test, ECG or other check while on both?
- What early warning signs should I watch for, and what should I do if they appear?
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References
Other interactions of Pazopanib
- Adagrasib + Pazopanib Major
- Amiodarone + Pazopanib Major
- Amisulpride + Pazopanib Major
- Amobarbital + Pazopanib Major
- Anagrelide + Pazopanib Major
- Apalutamide + Pazopanib Major
Frequently asked questions
Can I take Conivaptan with Pazopanib?
MediHelp rates the interaction as major. Conivaptan and Pazopanib can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for. Conivaptan is a strong CYP3A4 inhibitor and may increase pazopanib exposure. This raises the risk of hepatotoxicity, hypertension and QT prolongation.
How serious is the interaction between Conivaptan and Pazopanib?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid the combination if possible, and consider another therapy for hyponatremia. If it must be used, reduce pazopanib to 400 mg daily and monitor for toxicity.
What other medicines interact with Pazopanib?
MediHelp also lists interactions of Pazopanib with, for example, Adagrasib, Amiodarone, Amisulpride. The full list is on the Pazopanib page.
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