Sertraline and Dronedarone: 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
Dronedarone
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.
Both of these medicines can affect your heart's electrical timing, a change doctors call QT prolongation. Dronedarone (Multaq) is a heart rhythm drug, and sertraline is an antidepressant. When you take them together, their effects on that heart timing can add up, which in rare cases can trigger a dangerous fast heartbeat.
Because of this, the two are generally not recommended together. The good news is your care team can manage this safely. Please do not stop or change either medicine on your own. Instead, talk with your pharmacist or doctor, who can review your options and keep you protected.
Effect: Additive QTc prolongation, increasing torsade de pointes risk.
Mechanism: Both agents independently prolong the QT interval (pharmacodynamic additive effect). Dronedarone shows a dose-related QTc increase of approximately +10 ms at 400 mg BID; sertraline carries a dose-dependent QT effect. Neither is a prodrug relevant here.
- Direction: Additive PD interaction, increased effect on repolarization.
- Severity/evidence: Labeled contraindicated; evidence probable.
- Onset: Unspecified.
- Management: Avoid combination. If unavoidable, ECG/QTc and electrolyte (K+, Mg2+) monitoring; correct deficits; consider alternative agents.
What happens
Increased risk of QT interval prolongation
Interaction Deep Dive
A moderate, dose-dependent influence on the QTc interval is seen with dronedarone, producing an increase of +10 milliseconds at a dosage of 400 mg twice daily. Because of the potential risk of torsade de pointes-type ventricular tachycardia, it is contraindicated to give it together with agents that prolong the QT interval, including certain phenothiazines, tricyclic antidepressants, certain macrolide antibiotics, and Class I and III antiarrhythmics1.
Why it happens (mechanism)
Additive QT interval prolongation
How to manage this interaction
This combination is labeled as one to avoid because both drugs can lengthen the heart's QT interval, and together the risk of a dangerous rhythm goes up.
- Keep taking both exactly as prescribed for now, and do not stop either on your own.
- Contact your pharmacist or prescriber to review this pairing. They may choose a different medicine, or if both are needed, monitor you more closely.
- Your team may check an ECG and blood levels like potassium and magnesium, and correct any that are low.
- Report symptoms like fainting, dizziness, palpitations, or an irregular heartbeat right away.
Management is individual — confirm any change with your pharmacist or prescriber.
Common questions
Can I take Sertraline and Dronedarone together?
Dronedarone and sertraline both prolong the QT interval, and combining them is contraindicated because of the risk of a dangerous heart rhythm; talk with your pharmacist or doctor before making any changes. Always confirm with your pharmacist or prescriber before making any change.
How serious is the Sertraline and Dronedarone interaction?
It is rated contraindicated. These should generally not be used together.
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 Dronedarone interaction managed?
This combination is labeled as one to avoid because both drugs can lengthen the heart's QT interval, and together the risk of a dangerous rhythm goes up. Keep taking both exactly as prescribed for now, and do not stop either on your own. Contact your pharmacist or prescriber to review this pairing. They may choose a different medicine, or if both are needed, monitor you more closely. Your team may… Management is individual — always follow your own care team's guidance.
How strong is the evidence for this interaction?
The evidence is graded "probable". Good supporting evidence, though not definitively proven.
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 Dronedarone 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: MULTAQ(R) oral tablets, dronedarone oral tablets. sanofi-aventis US LLC (per manufacturer), Bridgewater, NJ, 2017. DailyMed
Keep reading about Dronedarone
Keep reading about Sertraline
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