Sertraline and Osimertinib: 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 recordOsimertinib
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 osimertinib (a cancer medicine for certain lung cancers) can each nudge the heart's electrical rhythm in the same direction. Doctors call this QT prolongation. When two medicines that do this are taken together, that effect can add up and, in rare cases, lead to an irregular heartbeat.
This concern is based on how the drugs work rather than lots of real-world reports, so please don't panic. The good news is your care team can manage this easily, often by checking your heart rhythm with an EKG from time to time. Never stop either medicine on your own. Just talk with your doctor or pharmacist so they can keep an eye on things.
Effect: Additive risk of QTc prolongation and, potentially, torsades de pointes.
Mechanism: Both agents independently prolong the QT interval; the interaction is pharmacodynamic (additive), not pharmacokinetic. Neither is a prodrug, so no activation reversal applies.
- Direction: Increased combined QT effect
- Onset: Unspecified
- Evidence: Theoretical
- Severity: Major
Management: Avoid concomitant use with QT-prolonging agents carrying known torsades risk where feasible. If co-administration is necessary, obtain periodic ECGs, monitor and correct electrolytes (K+, Mg2+), and review other QT-prolonging drugs. Dose and monitoring should be individualized by the care team.
What happens
Increased risk of QT interval prolongation
Interaction Deep Dive
Where feasible, refrain from using this agent alongside medications recognized to lengthen the QTc interval that carry an established risk of torsades de pointes. Should combined use prove necessary, perform periodic ECG assessment1.
Why it happens (mechanism)
Additive QT interval prolongation
How to manage this interaction
Both medicines can affect your heart's rhythm, so your care team will decide whether they can be used together safely or whether an alternative fits better.
- Keep taking both as prescribed unless your doctor tells you otherwise.
- Your team may check your heart with a periodic EKG and may review your blood levels of potassium and magnesium.
- Your medicines may need to be adjusted and individualized by your care team.
- Tell your pharmacist about any other medicines that affect heart rhythm.
Report symptoms like fainting, dizziness, or a pounding or irregular heartbeat to your doctor right away.
Management is individual — confirm any change with your pharmacist or prescriber.
Common questions
Can I take Sertraline and Osimertinib together?
Sertraline and osimertinib can each affect heart rhythm, and together the effect may add up, so your care team may avoid the combination when possible or monitor your heart with periodic EKGs. Keep taking both as prescribed and talk with your doctor or pharmacist. Always confirm with your pharmacist or prescriber before making any change.
How serious is the Sertraline and Osimertinib 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 Osimertinib interaction managed?
Both medicines can affect your heart's rhythm, so your care team will decide whether they can be used together safely or whether an alternative fits better. Keep taking both as prescribed unless your doctor tells you otherwise. Your team may check your heart with a periodic EKG and may review your blood levels of potassium and magnesium. Your medicines may need to be adjusted and individualized by… 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 Osimertinib 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: TAGRISSO(R) oral tablets, osimertinib oral tablets. AstraZeneca Pharmaceuticals LP (per manufacturer), Wilmington, DE, 2018. DailyMed
Keep reading about Sertraline
Keep reading about Osimertinib
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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