Sertraline and Probucol: 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 recordProbucol
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 sertraline (an antidepressant) and probucol (a cholesterol-lowering medicine) can each affect your heart's electrical rhythm in a small way. Doctors call this QT prolongation. When two medicines that do this are taken together, the effect can add up and, in rare cases, lead to an irregular heartbeat.
This concern is based mostly on how these drugs work rather than lots of reported cases, so please don't panic. The most important thing is not to stop or change either medicine on your own. Talk with your pharmacist or doctor, they can review your heart health and decide the safest plan for you.
Effect: Additive QT interval prolongation with increased risk of ventricular arrhythmias (including torsades de pointes) when sertraline and probucol are combined.
Mechanism: Both agents independently prolong cardiac repolarization; effects are additive (pharmacodynamic, not PK-based). Neither is a prodrug in this context.
- Direction: Increased combined QT effect
- Severity: Major
- Onset: Unspecified
- Evidence: Theoretical
Management: Coadministration is generally best avoided. If both are required, obtain baseline/follow-up ECG, monitor electrolytes (K+, Mg2+), and assess other QT-prolonging drugs or risk factors.
What happens
An increased risk of QT interval prolongation
Interaction Deep Dive
Because the combination may heighten the likelihood of QT prolongation and/or ventricular arrhythmias, giving sertraline together with this drug should be avoided1.
Why it happens (mechanism)
Additive QT interval prolongation
How to manage this interaction
Because both medicines can affect heart rhythm, care teams often prefer to avoid using them together when possible.
- Keep taking both exactly as prescribed until you speak with your prescriber or pharmacist. Do not stop on your own.
- Your team may choose an alternative medicine, or monitor you more closely with an ECG (heart tracing) and blood tests for potassium and magnesium.
- Tell your care team about any other medicines you take, since some also affect heart rhythm.
Seek help promptly if you feel fainting, dizziness, palpitations, or an irregular heartbeat.
Management is individual — confirm any change with your pharmacist or prescriber.
Common questions
Can I take Sertraline and Probucol together?
Sertraline and probucol can each stretch the heart's QT interval, and together the risk of a dangerous rhythm may add up, so this combination is usually avoided. Talk with your doctor or pharmacist before changing anything. Always confirm with your pharmacist or prescriber before making any change.
How serious is the Sertraline and Probucol 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 Probucol interaction managed?
Because both medicines can affect heart rhythm, care teams often prefer to avoid using them together when possible. Keep taking both exactly as prescribed until you speak with your prescriber or pharmacist. Do not stop on your own. Your team may choose an alternative medicine, or monitor you more closely with an ECG (heart tracing) and blood tests for potassium and magnesium. Tell your care team a… 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 Probucol 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 Probucol
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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