Sertraline and Quizartinib: 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 recordQuizartinib
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.
You've been prescribed sertraline (an antidepressant) along with quizartinib (a cancer medicine). Both of these drugs can affect the timing of your heartbeat, something doctors call QT prolongation. When two medicines that do this are taken together, the effect can add up and slightly raise the chance of an irregular heartbeat.
The good news is this is a known, manageable situation. Your care team can keep an eye on your heart with an ECG and check your blood minerals (like potassium and magnesium). Please keep taking both medicines as prescribed, and talk with your pharmacist or doctor before making any changes.
Effect: Additive QT interval prolongation with combined sertraline and quizartinib.
- Mechanism: Both agents independently prolong the QT interval; effect is pharmacodynamic and additive (neither is a prodrug here).
- Direction: Increased risk of QTc prolongation and torsades de pointes.
- Evidence: Theoretical; severity rated major.
- Onset: Unspecified.
- Management: Monitor ECG and serum electrolytes (K+, Mg2+); correct deficiencies. Per labeling, reduce, interrupt, or discontinue quizartinib as clinically appropriate. Individualize dosing and increase monitoring in higher-risk patients.
What happens
An increased risk of QT interval prolongation
Interaction Deep Dive
Giving quizartinib together with additional agents known to lengthen the QT interval can heighten the frequency of QT prolongation even further. Track electrocardiograms along with serum electrolyte concentrations. Depending on the clinical situation, lower the dose of quizartinib, pause it, or stop it entirely1.
Why it happens (mechanism)
Additive QT interval prolongation
How to manage this interaction
Your care team can manage this combination safely with monitoring:
- Expect ECG checks to watch your heart rhythm.
- Expect blood tests for electrolytes such as potassium and magnesium, which the team can correct if low.
- Your quizartinib dose may need to be adjusted and individualized by your oncology team based on your results.
Keep taking both medicines exactly as prescribed. Tell your pharmacist or doctor if you feel faint, dizzy, or notice a fluttering or racing heartbeat, and check with them before starting any new medicines.
Management is individual — confirm any change with your pharmacist or prescriber.
Common questions
Can I take Sertraline and Quizartinib together?
Taking sertraline and quizartinib together can add up to raise the risk of QT prolongation (an irregular heartbeat), so your team will monitor your ECG and electrolytes and adjust the quizartinib dose if needed. Keep taking both as prescribed and report dizziness or palpitations. Always confirm with your pharmacist or prescriber before making any change.
How serious is the Sertraline and Quizartinib 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 Quizartinib interaction managed?
Your care team can manage this combination safely with monitoring: Expect ECG checks to watch your heart rhythm. Expect blood tests for electrolytes such as potassium and magnesium, which the team can correct if low. Your quizartinib dose may need to be adjusted and individualized by your oncology team based on your results. Keep taking both medicines exactly as prescribed. Tell your pharmacist or… 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 Quizartinib 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: VANFLYTA® oral tablets, quizartinib oral tablets. Daiichi Sankyo, Basking Ridge, NJ, 2026. DailyMed
Keep reading about Sertraline
Keep reading about Quizartinib
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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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