Sertraline and Conivaptan: Interaction Details
AI-assisted, pharmacist-reviewed · AI content regenerated Jul 11, 2026 · Source data updated Jul 2, 2026 · Sources: FDA labeling, DDInter 2.0, cited literature
Conivaptan
Sertraline
No brand names on record
How we grade severity & evidence
Severity levels
- Contraindicated: These should generally not be used together.
- Major: Potentially serious — often needs a change or close monitoring.
- Moderate: Can be significant — usually manageable with monitoring.
- Minor: Usually limited clinical impact.
Evidence grades
- Established: Well documented — supported by controlled studies or strong clinical data.
- Probable: Good supporting evidence, though not definitively proven.
- Suspected: Some evidence suggests this interaction, but it is not well established.
- Possible: Limited or conflicting evidence; the interaction may occur.
- Theoretical: Predicted from the drugs' pharmacology; not yet confirmed in people.
Ratings come from the documented interaction literature and are reviewed by a pharmacist. They describe the documented risk of the combination, not what will necessarily happen to you — your dose, timing, and health picture all matter.
Here's what's going on. Conivaptan (Vaprisol) is a strong blocker of a liver enzyme called CYP3A. Your body uses that same enzyme to help break down and clear sertraline. When conivaptan blocks it, sertraline can build up higher than expected, which could mean more of its side effects, like nausea, jitteriness, trouble sleeping, or dizziness.
The good news: conivaptan is usually given short-term in the hospital through an IV, so this is easy for your care team to plan around. Please don't stop or change either medicine on your own. Just talk with your pharmacist or doctor so they can time things safely and keep an eye on you.
Mechanism: Conivaptan is a strong CYP3A inhibitor. Sertraline undergoes hepatic metabolism partly via CYP3A (and CYP2C19/2B6), so inhibition may reduce clearance and increase sertraline exposure (AUC/Cmax).
- Direction: increased sertraline exposure and potential for enhanced serotonergic/adverse effects.
- Magnitude: not quantified for sertraline; conivaptan raised AUC of midazolam, simvastatin, and amlodipine.
- Evidence: theoretical; severity rated major.
- Management: avoid concurrent use. Because conivaptan is a potent enzyme inhibitor with a residual effect, a CYP3A substrate should not be started sooner than 1 week after completing conivaptan. Monitor for serotonergic and dose-related sertraline effects if exposure occurs.
What happens
Increased CYP3A substrate exposure
Interaction Deep Dive
Do not use conivaptan (a strong CYP3A inhibitor) together with medications that are cleared mainly through CYP3A-mediated metabolism, because doing so can raise the exposure of the CYP3A substrate. The AUC of the CYP3A substrates midazolam, simvastatin, and amLODIPine was increased by conivaptan. A CYP3A substrate should not be started until at least 1 week has passed after conivaptan therapy has ended1.
Why it happens (mechanism)
Inhibition of CYP3A-mediated substrate metabolism by conivaptan
How to manage this interaction
What your care team may do:
- Generally avoid using conivaptan and sertraline at the same time.
- Since conivaptan (given short-term in a hospital) keeps affecting the enzyme for a while, sertraline may not be started until at least 1 week after conivaptan is finished.
- Watch you more closely for sertraline-related effects such as nausea, restlessness, or dizziness if both are needed.
What you should do: Keep taking your medicines exactly as prescribed and don't change anything on your own. Let your pharmacist or prescriber know you take sertraline before starting conivaptan so they can plan the timing and adjust or monitor as needed.
Management is individual — confirm any change with your pharmacist or prescriber.
Literature reports
3 reports — tap to read
a) Conivaptan, a potent CYP3A inhibitor, given at 40 mg/day IV raised the AUC of midazolam, a CYP3A substrate, by roughly 100% when midazolam was administered as a 1 mg IV dose and by 200% with a 2 mg oral dose 1.
b) Intravenous conivaptan at 30 mg/day produced a threefold increase in the AUC of simvastatin, a CYP3A substrate 1.
c) Conivaptan 40 mg taken orally twice daily doubled both the AUC and the half-life of amLODIPine, a CYP3A substrate 1.
Common questions
Can I take Sertraline and Conivaptan together?
Conivaptan can raise sertraline levels by blocking the CYP3A enzyme, so these two are generally avoided together; your care team will usually wait at least a week after conivaptan before starting sertraline. Keep taking your medicines as prescribed and confirm the plan with your pharmacist or doctor. Always confirm with your pharmacist or prescriber before making any change.
How serious is the Sertraline and Conivaptan interaction?
It is rated major. Potentially serious — often needs a change or close monitoring.
How quickly could this interaction happen?
The documented onset is "unspecified". The timing of this interaction is not well characterized.
How is the Sertraline and Conivaptan interaction managed?
What your care team may do: Generally avoid using conivaptan and sertraline at the same time. Since conivaptan (given short-term in a hospital) keeps affecting the enzyme for a while, sertraline may not be started until at least 1 week after conivaptan is finished. Watch you more closely for sertraline-related effects such as nausea, restlessness, or dizziness if both are needed. What you should d… Management is individual — always follow your own care team's guidance.
How strong is the evidence for this interaction?
The evidence is graded "theoretical". Predicted from the drugs' pharmacology; not yet confirmed in people.
From our Q&A
Real reader questions about these medications, each personally answered by our pharmacist:
Questions for your pharmacist
- Does my dose of Sertraline or Conivaptan need adjusting while I take them together?
- What symptoms should prompt me to call you or my prescriber right away?
- Does the timing of my doses matter for this combination?
- Is there a safer alternative to one of these medications for me?
References (1)
- Product Information: VAPRISOL(R) intravenous injection, conivaptan HCl intravenous injection. Cumberland Pharmaceuticals Inc. (per manufacturer), Nashville, TN, 2014.
Keep reading about Conivaptan
Keep reading about Sertraline
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