Drug interactions
Conivaptan + Nevirapine
Severity: Major
Conivaptan and Nevirapine: major 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 inhibits CYP3A4 and may raise nevirapine concentrations, increasing the risk of rash and hepatotoxicity.
What this interaction means in plain words
Conivaptan and Nevirapine 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
Conivaptan inhibits CYP3A4, reducing nevirapine metabolism.
What to do
Avoid combination; if unavoidable, monitor liver enzymes and skin reactions.
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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Other interactions of Nevirapine
- Elbasvir / grazoprevir + Nevirapine Contraindicated
- Nevirapine + Ranolazine Contraindicated
- Nevirapine + St john's wort Contraindicated
- Abemaciclib + Nevirapine Major
- Acalabrutinib + Nevirapine Major
- Amobarbital + Nevirapine Major
Frequently asked questions
Can I take Conivaptan with Nevirapine?
MediHelp rates the interaction as major. Conivaptan and Nevirapine 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 inhibits CYP3A4 and may raise nevirapine concentrations, increasing the risk of rash and hepatotoxicity.
How serious is the interaction between Conivaptan and Nevirapine?
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 combination; if unavoidable, monitor liver enzymes and skin reactions.
What other medicines interact with Nevirapine?
MediHelp also lists interactions of Nevirapine with, for example, Elbasvir / grazoprevir, Ranolazine, St john's wort. The full list is on the Nevirapine page.
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