Sertraline and Ioflupane I 123: 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 recordIoflupane I 123
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.
Ioflupane I 123 is not a medicine you take every day. It is a special dye used for a brain scan (a DaTscan) that looks at dopamine nerve signals, often to help check for conditions like Parkinson's. The problem is that your antidepressant, sertraline, can attach to the same spot in the brain that the dye is trying to reach. That competition can make the scan pictures harder to read and could affect the results.
This concern is based on how these drugs work rather than on strong studies, but it is taken seriously because an unclear scan could lead to a wrong answer. The good news is this is very manageable. Just tell the team ordering your scan that you take sertraline, and they will plan the timing. Never stop your antidepressant on your own.
Effect: Sertraline may interfere with ioflupane I 123 (DaTscan) image quality and interpretation.
Mechanism: Competitive binding at the presynaptic dopamine transporter (DAT), the target ioflupane binds to for SPECT imaging. Neither agent is affected via enzyme induction/inhibition here; this is a pharmacodynamic/imaging-target competition. Sertraline is an active drug, not a prodrug.
- Direction: Reduced/altered radiotracer binding, degrading scan reliability.
- Evidence: Theoretical; magnitude and whether washout resolves it are not established.
- Onset: Unspecified.
Management: Disclose sertraline use before scheduling. Consider holding sertraline for at least 5 biological half-lives prior to administration if clinically appropriate, per the imaging and prescribing teams.
What happens
Interference with ioflupane I 123 imaging
Interaction Deep Dive
When ioflupane I 123 is administered together with sertraline, interference with ioflupane I 123 imaging may occur. Whether stopping sertraline before giving ioflupane I 123 would reduce this interference is not known. Because sertraline may affect how ioflupane images are interpreted, consider stopping it for a minimum of 5 biological half-lives prior to ioflupane administration1.
Why it happens (mechanism)
Competitive binding to the DOPamine transporter
How to manage this interaction
This interaction matters only around the time of a DaTscan (ioflupane I 123 imaging), not for everyday use of your medications.
- Tell the imaging team and your prescriber that you take sertraline before your scan is scheduled.
- Your care team may decide to pause sertraline before the scan (guidance suggests roughly 5 of the drug's half-lives ahead of time) so it does not blur the results. This timing will be individualized by your team.
- Keep taking sertraline as prescribed unless your doctor specifically tells you to stop, since stopping an antidepressant needs medical guidance.
Ask your pharmacist or prescriber to confirm the exact plan for your situation.
Management is individual — confirm any change with your pharmacist or prescriber.
Common questions
Can I take Sertraline and Ioflupane I 123 together?
Sertraline can interfere with an ioflupane I 123 (DaTscan) brain scan by competing at the dopamine transporter, so tell your imaging team and prescriber you take it; they may hold it beforehand and will tailor the timing, but do not stop it on your own. Always confirm with your pharmacist or prescriber before making any change.
How serious is the Sertraline and Ioflupane I 123 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 Ioflupane I 123 interaction managed?
This interaction matters only around the time of a DaTscan (ioflupane I 123 imaging), not for everyday use of your medications. Tell the imaging team and your prescriber that you take sertraline before your scan is scheduled. Your care team may decide to pause sertraline before the scan (guidance suggests roughly 5 of the drug's half-lives ahead of time) so it does not blur the results. This timin… 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 Ioflupane I 123 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: DATSCAN intravenous injection, ioflupane I 123 intravenous injection. GE Healthcare, Medi-Physics, Inc, Arlington Heights, IL, 2026. DailyMed
Keep reading about Sertraline
Keep reading about Ioflupane I 123
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.
Check another combination
Our instant two-drug interaction checker is almost here.
Still have questions about this combination?
Every question gets a real answer from a licensed pharmacist — free, and usually within a day.
Ask the pharmacist