Trospium / Xanomeline and Sufentanil: 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
Sufentanil
Trospium / 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.
Here's the short version: Sufentanil (Dsuvia) is a strong opioid pain medicine, and one part of Cobenfy (trospium) is an anticholinergic. Both of these can slow down your gut and make it harder to empty your bladder. When you take them together, those effects can add up.
That means you may notice constipation or trouble urinating. In rare cases, the gut can slow down so much that it nearly stops, which is serious. The good news is your care team can watch for this and manage it. Let them know right away if you can't have a bowel movement, feel bloated and crampy, or have trouble peeing.
Effect: Additive anticholinergic and opioid-mediated reduction in GI and urinary motility. Sufentanil (mu-opioid agonist) plus trospium (antimuscarinic component of Cobenfy) may increase risk of urinary retention and severe constipation progressing to paralytic ileus.
Direction: Pharmacodynamic (additive), not a metabolic interaction; neither agent is a prodrug relevant here.
- Onset: unspecified
- Evidence: theoretical; mechanism additive/PD
- Severity: major
Management: Monitor for reduced gastric motility, abdominal distension, and urinary retention. Consider prophylactic bowel regimen and dose individualization by the care team.
What happens
Increased risk of urinary retention and/or severe constipation leading to paralytic ileus
Interaction Deep Dive
Taking SUFentanil together with anticholinergics can heighten the likelihood of urinary retention and/or severe constipation, potentially progressing to paralytic ileus. When SUFentanil and anticholinergic agents are administered together, watch patients for indications of urinary retention or diminished gastric motility12.
Why it happens (mechanism)
Unknown
How to manage this interaction
Keep taking both medicines as prescribed unless your prescriber tells you otherwise. This combination is used with extra attention rather than automatically avoided.
Here is what typically helps:
- Your care team may monitor you more closely for constipation and trouble urinating, especially early on.
- Doses may be adjusted and individualized by your team if problems come up.
- Staying hydrated and staying active can help keep your gut moving.
Call your pharmacist or doctor if you have no bowel movement for a few days, painful bloating, vomiting, or cannot pass urine. These need prompt attention.
Management is individual — confirm any change with your pharmacist or prescriber.
Common questions
Can I take Trospium / Xanomeline and Sufentanil together?
Taking sufentanil with Cobenfy (trospium) can add up to cause constipation or trouble urinating, and rarely a dangerously slowed gut. Keep taking both as prescribed, watch for these symptoms, and tell your care team promptly if they occur. Always confirm with your pharmacist or prescriber before making any change.
How serious is the Trospium / Xanomeline and Sufentanil 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 Trospium / Xanomeline and Sufentanil interaction managed?
Keep taking both medicines as prescribed unless your prescriber tells you otherwise. This combination is used with extra attention rather than automatically avoided. Here is what typically helps: Your care team may monitor you more closely for constipation and trouble urinating, especially early on. Doses may be adjusted and individualized by your team if problems come up. Staying hydrated and sta… 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.
Questions for your pharmacist
- Does my dose of Trospium / Xanomeline or Sufentanil 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: Sufentanil citrate injection, sufentanil citrate r intravenous and epidural injection. Akron Inc (per FDA), Lake Forest, IL, 2023. DailyMed
- Product Information: DSUVIA(TM) sublingual tablets, sufentanil sublingual tablets. AcelRx Pharmaceuticals Inc (per FDA), Hayward, CA, 2023. DailyMed
Keep reading about Sufentanil
Keep reading about Trospium / Xanomeline
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