Sertraline and Trospium / Xanomeline: 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 recordTrospium / Xanomeline
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're taking sertraline along with Cobenfy (which contains xanomeline and trospium). Sertraline can gently slow down one of the liver enzymes (called CYP2D6) that helps break down certain medicines. When that enzyme is slowed, the other medicine can build up a little more than expected, which may lead to stronger effects or more side effects.
Please know this is based mostly on how these drugs work in theory, not on lots of real-world reports, so there's no need to worry. The most important thing is simply to make sure your pharmacist and doctor know you take both. They can adjust doses and keep a closer eye on you so everything stays safe.
Mechanism: Sertraline is a moderate CYP2D6 inhibitor. Coadministration with a CYP2D6 substrate can reduce substrate clearance, increasing its exposure (AUC/Cmax) and potential for concentration-related adverse effects.
- Direction: Increased substrate exposure (neither agent here is a prodrug requiring 2D6 activation).
- Evidence: Theoretical; magnitude and onset not characterized.
- Severity: Major on file.
- Management: If coadministration is required, reduce the CYP2D6 substrate dose as clinically indicated and monitor for enhanced/adverse effects. On sertraline discontinuation, an upward dose adjustment of the substrate may be needed. Tailor and monitor per response.
What happens
Increased CYP2D6 substrate exposure
Interaction Deep Dive
Taking sertraline (which inhibits CYP2D6) together with a substrate of CYP2D6 can raise the exposure to that CYP2D6 substrate. When the two must be given together, lower the dose of the CYP2D6 substrate as appropriate; on the other hand, stopping sertraline may call for raising the dose of a CYP2D6 substrate1.
Why it happens (mechanism)
Inhibition of CYP2D6 substrate metabolism by sertraline
How to manage this interaction
Keep taking both medications as prescribed unless your care team tells you otherwise. This interaction can usually be managed well.
- Your team may adjust and individualize the dose of the affected medicine, and may monitor you more closely for side effects.
- If sertraline is later stopped, the other medicine's dose may need to be increased again, so keep your team in the loop about any changes.
- Tell your pharmacist and prescriber that you take both, and report any new or stronger side effects such as increased dry mouth, dizziness, or feeling off.
Management is individual — confirm any change with your pharmacist or prescriber.
Literature reports
1 report — tap to read
a) In studies of drug interactions, PARoxetine showed the following effects on medications that are metabolized by CYP2D6. At steady-state, PARoxetine 20 mg once daily raised the Cmax, AUC, and t(1/2) of a single 100 mg dose of desipramine by roughly 2-fold, 5-fold, and 3-fold, respectively. Among patients stabilized on risperiDONE 4 to 8 mg/day, daily PARoxetine 20 mg raised mean plasma levels of risperiDONE by 4-fold, lowered 9-hydroxyrisperiDONE levels by 10%, and increased levels of the active moiety by 1.4-fold. In healthy volunteers who were extensive CYP2D6 metabolizers, steady-state atomoxetine AUC values were 6- to 8-fold greater and Cmax values were 3- to 4-fold greater when PARoxetine was given concurrently compared with atomoxetine given alone. Mean digoxin steady-state AUC fell by 15% when PARoxetine was present. In a study using propranolol 80 mg twice daily for 18 days, the steady-state plasma levels of propranolol remained unchanged during coadministration with PARoxetine 30 mg once daily over the final 10 days 2.
Common questions
Can I take Sertraline and Trospium / Xanomeline together?
Sertraline can raise levels of a CYP2D6 substrate, so let your pharmacist and doctor know you take both; they can adjust the dose and watch for side effects. This concern is theoretical, and your care team can manage it. Always confirm with your pharmacist or prescriber before making any change.
How serious is the Sertraline and Trospium / Xanomeline 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 Trospium / Xanomeline interaction managed?
Keep taking both medications as prescribed unless your care team tells you otherwise. This interaction can usually be managed well. Your team may adjust and individualize the dose of the affected medicine, and may monitor you more closely for side effects. If sertraline is later stopped, the other medicine's dose may need to be increased again, so keep your team in the loop about any changes. Tell… 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 Trospium / Xanomeline 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 (2)
- Product Information: ZOLOFT oral tablets, oral solution, sertraline hydrochloride oral tablets, oral solution. Viatris Specialty LLC (per FDA), Morgantown, WV, 2023. DailyMed
- Product Information: PEXEVA(R) oral tablets, paroxetine mesylate oral tablets. Sebela Pharmaceuticals Inc (per FDA), Roswell, GA, 2023.
Keep reading about Sertraline
Keep reading about Trospium / Xanomeline
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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