Sertraline and Clomipramine: 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
Clomipramine
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.
Clomipramine and sertraline both raise serotonin, a brain chemical that affects mood. When you take them together, the levels can climb too high. On top of that, sertraline can slow down the liver enzyme (called CYP2D6) that breaks clomipramine down, so more clomipramine builds up in your body. Both medicines can also affect the heart's rhythm.
This means a higher chance of a reaction called serotonin syndrome (shivering, sweating, fast heartbeat, agitation, muscle twitching) and possible heart-rhythm changes. The good news is your care team can manage this by adjusting doses and watching you closely. Never stop either drug on your own, but do talk with your pharmacist or doctor.
Interaction: Additive serotonergic and QT-prolonging effects, plus sertraline inhibition of CYP2D6 increasing clomipramine (a CYP2D6 substrate) exposure. Both are serotonergic; neither is a prodrug, so raised clomipramine levels mean stronger, not weaker, effect.
- Direction: Increased clomipramine AUC/Cmax; additive serotonin toxicity and QTc prolongation risk.
- Onset: Unspecified.
- Evidence: Theoretical.
- Management: Avoid combination where possible. If required, the clomipramine dose may need to be reduced and individualized; expect to re-increase it if sertraline is stopped. Monitor for serotonin syndrome (especially at initiation/titration) and consider ECG monitoring. 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
Concurrent use of sertraline with serotonergic CYP2D6 substrates that extend the QT interval should be avoided, since such combinations can raise CYP2D6 substrate exposure and heighten the likelihood of QT prolongation, ventricular arrhythmias, and/or serotonin syndrome. As a CYP2D6 inhibitor, sertraline has been linked to serotonin syndrome even when used alone, and combining it with additional serotonergic agents raises the chance of this reaction. Should coadministration be unavoidable, reduce the CYP2D6 substrate dose as required; likewise, the CYP2D6 substrate dosage may need to be raised once sertraline is stopped. Watch for signs of serotonin syndrome, particularly at the start of therapy and when doses are escalated. If serotonin syndrome is suspected, sertraline and the other serotonergic agents should be halted right away and supportive care initiated1.
Why it happens (mechanism)
Inhibition of CYP2D6-mediated metabolism by sertraline; additive serotonergic effects; additive QT interval prolongation
How to manage this interaction
What your care team may do:
- Consider whether both drugs are truly needed, or whether an alternative fits better.
- If both are used together, lower the clomipramine dose as needed. It may need to be adjusted and individualized by your care team, and raised again if sertraline is later stopped.
- Monitor you more closely, especially when starting or increasing a dose, and possibly check your heart rhythm with an ECG.
What you should do: Keep taking both exactly as prescribed and do not change anything on your own. Contact your pharmacist or prescriber right away if you notice agitation, sweating, shivering, fast heartbeat, muscle twitching, fainting, or palpitations.
Management is individual — confirm any change with your pharmacist or prescriber.
Common questions
Can I take Sertraline and Clomipramine together?
Taking clomipramine with sertraline raises clomipramine levels and adds up serotonin and heart-rhythm effects, so this combination is usually avoided; if used together, your team will lower the clomipramine dose and monitor you closely. Report any agitation, sweating, muscle twitching, or palpitations promptly. Always confirm with your pharmacist or prescriber before making any change.
How serious is the Sertraline and Clomipramine 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 Clomipramine interaction managed?
What your care team may do: Consider whether both drugs are truly needed, or whether an alternative fits better. If both are used together, lower the clomipramine dose as needed. It may need to be adjusted and individualized by your care team, and raised again if sertraline is later stopped. Monitor you more closely, especially when starting or increasing a dose, and possibly check your heart rhyt… 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 Clomipramine 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 Clomipramine
Keep reading about Sertraline
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