Vorinostat and Sertraline: 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
Sertraline
No brand names on recordVorinostat
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.
Both sertraline (an antidepressant) and vorinostat (a cancer medicine) can each affect your heart's electrical rhythm in the same way. They can slightly stretch out a part of the heartbeat called the QT interval. When you take both together, those effects can add up, which can raise the chance of an irregular heartbeat.
This concern is based mostly on how these drugs work rather than lots of real-world reports, but because it involves the heart, it's taken seriously. The good news is your care team can manage this. Please don't stop either medicine on your own, just talk with your doctor or pharmacist so they can pick the safest plan for you.
Effect: Additive QT interval prolongation with increased risk of ventricular arrhythmias (including torsades de pointes) when sertraline is combined with vorinostat.
Mechanism: Pharmacodynamic (additive), not PK-based. Both agents independently prolong cardiac repolarization; neither is a prodrug relevant here.
- Direction: Increased combined QT effect.
- Onset: Unspecified.
- Evidence: Theoretical.
- Severity: Major.
Management: Avoid coadministration where possible. If both are required, obtain baseline and follow-up ECGs, correct/monitor electrolytes (K+, Mg2+), and review other QT-prolonging agents.
What happens
An increased risk of QT interval prolongation
Interaction Deep Dive
The combined use of sertraline with this drug should be avoided, since doing so can heighten the likelihood of QT prolongation and/or ventricular arrhythmias1.
Why it happens (mechanism)
Additive QT interval prolongation
How to manage this interaction
What your care team may do:
- Consider whether both drugs are truly needed together, or whether an alternative is available.
- Monitor you more closely, which may include ECGs to watch the QT interval and checking blood electrolytes like potassium and magnesium.
- Review your full medication list for other drugs that can affect heart rhythm.
What you should do: Keep taking both exactly as prescribed unless your prescriber tells you otherwise. Ask your pharmacist or doctor about this combination, and report symptoms like fainting, palpitations, or dizziness right away.
Management is individual — confirm any change with your pharmacist or prescriber.
Common questions
Can I take Vorinostat and Sertraline together?
Combining sertraline and vorinostat can add up to prolong the QT interval and raise the risk of a dangerous heart rhythm, so this pairing is usually avoided. Talk to your doctor or pharmacist before changing anything. Always confirm with your pharmacist or prescriber before making any change.
How serious is the Vorinostat and Sertraline 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 Vorinostat and Sertraline interaction managed?
What your care team may do: Consider whether both drugs are truly needed together, or whether an alternative is available. Monitor you more closely, which may include ECGs to watch the QT interval and checking blood electrolytes like potassium and magnesium. Review your full medication list for other drugs that can affect heart rhythm. What you should do: Keep taking both exactly as prescribed unl… 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 Vorinostat or Sertraline 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: ZOLOFT oral tablets, oral solution, sertraline hydrochloride oral tablets, oral solution. Viatris Specialty LLC (per FDA), Morgantown, WV, 2023. DailyMed
Keep reading about Sertraline
Keep reading about Vorinostat
These medications also interact with supplements
Prescription drugs aren't the whole picture — herbal and dietary supplements can interact with them too. From the evidence-graded Natural Medicines database:
major · moderate · minor — check everything you take with our drug–supplement interaction checker.
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