Sertraline and Desipramine: 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
Desipramine
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 affect a brain chemical called serotonin, and sertraline can slow down how your body breaks down desipramine. That means more desipramine can build up in your system. Together this can raise the chance of side effects, including a rare but serious reaction called serotonin syndrome (things like agitation, fast heartbeat, sweating, shivering, or confusion). Both drugs can also affect your heart's rhythm.
The good news is your care team knows about this combination and can manage it, often by adjusting your desipramine dose and keeping a closer eye on you. Take both exactly as prescribed and let your doctor or pharmacist know if you feel unwell.
Effect: Sertraline inhibits CYP2D6, reducing clearance of desipramine (a CYP2D6 substrate), increasing its exposure. Added to this are additive serotonergic effects and additive QT prolongation.
- Direction: Increased desipramine levels; increased risk of serotonin syndrome and ventricular arrhythmia.
- Evidence: Theoretical; severity rated major.
- Onset: Unspecified.
- Management: Avoid if possible. If combined, reduce desipramine dose as needed; consider dose increase when sertraline is stopped. Consider TDM of desipramine and ECG/electrolyte monitoring. Monitor for serotonin syndrome, especially at initiation and dose escalation. Discontinue serotonergic agents and give supportive care if serotonin syndrome is suspected.
What happens
Increased CYP2D6 substrate exposure, an increased risk of serotonin syndrome and an increased risk of QT interval prolongation
Interaction Deep Dive
Do not give sertraline together with serotonergic CYP2D6 substrates that lengthen the QT interval, since doing so can raise exposure to the CYP2D6 substrate and heighten the likelihood of QT prolongation, ventricular arrhythmias, and/or serotonin syndrome. As an inhibitor of CYP2D6, sertraline has itself been linked to serotonin syndrome even when used alone, and combining it with additional serotonergic drugs elevates the chance of this reaction. Should the combination be unavoidable, reduce the dose of the CYP2D6 substrate as required; on the other hand, the CYP2D6 substrate dose may have to be raised once sertraline is stopped. Watch for signs of serotonin syndrome, particularly when starting therapy and when doses are raised. If serotonin syndrome is suspected, stop sertraline and any other serotonergic agents at once and give supportive care1.
Why it happens (mechanism)
Inhibition of CYP2D6-mediated metabolism by sertraline; additive serotonergic effects; additive QT interval prolongation
How to manage this interaction
This combination is usually one clinicians try to avoid, but when both are needed, it can be managed safely.
- Keep taking both as prescribed unless your doctor tells you otherwise. Do not start, stop, or change doses on your own.
- Your desipramine dose may need to be adjusted and individualized by your care team, and they may monitor you more closely (including heart rhythm).
- If sertraline is later stopped, your desipramine dose may need to be increased again.
- Get urgent help for signs of serotonin syndrome: agitation, confusion, fast heartbeat, high fever, heavy sweating, shivering, muscle twitching, or tremor.
Management is individual — confirm any change with your pharmacist or prescriber.
Common questions
Can I take Sertraline and Desipramine together?
Sertraline can raise desipramine levels and add to serotonin and heart-rhythm effects, so this pairing is often avoided; if used together, expect dose adjustments and closer monitoring, and seek help right away for symptoms like agitation, fast heartbeat, or fever. Always confirm with your pharmacist or prescriber before making any change.
How serious is the Sertraline and Desipramine 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 Desipramine interaction managed?
This combination is usually one clinicians try to avoid, but when both are needed, it can be managed safely. Keep taking both as prescribed unless your doctor tells you otherwise. Do not start, stop, or change doses on your own. Your desipramine dose may need to be adjusted and individualized by your care team, and they may monitor you more closely (including heart rhythm). If sertraline is later… 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 Desipramine 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 Desipramine
Keep reading about Sertraline
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