Trospium / Xanomeline and Oliceridine: 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
Oliceridine
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 what's going on. Oliceridine (Olinvyk) is a strong opioid pain medicine. Like other opioids, it can slow down your gut and make it harder to empty your bladder. Cobenfy contains trospium, which is an anticholinergic, meaning it can also slow the gut and the bladder.
When you take both, those effects can add up. That may lead to bad constipation or trouble urinating, and in rare cases the gut can nearly stop moving (called a paralytic ileus). This concern is based on how these drugs work rather than lots of real-world reports. The good news is your care team knows how to watch for this and keep you comfortable, so let them know about any belly pain, bloating, or trouble peeing.
Mechanism: additive pharmacodynamic effect. Oliceridine, a mu-opioid receptor agonist, reduces GI motility and bladder function; trospium (a component of Cobenfy) is an antimuscarinic anticholinergic with similar effects. Neither is a prodrug in a way that reverses this; the effects simply summate.
- Direction: increased anticholinergic/opioid-type adverse effects (urinary retention, severe constipation, potential paralytic ileus).
- Evidence: theoretical; magnitude and onset not established.
- Monitoring: assess bowel function and voiding; watch for abdominal distension, decreased bowel sounds, inability to void.
- Management: consider prophylactic bowel regimen, individualize dosing, and monitor more closely.
What happens
Increased risk of urinary retention and/or severe constipation leading to paralytic ileus
Interaction Deep Dive
When oliceridine is taken together with anticholinergics, the likelihood of urinary retention and/or serious constipation may rise, and this can progress to paralytic ileus. During concurrent administration of oliceridine and anticholinergic agents, watch patients for indications of urinary retention or diminished gastric motility1.
Why it happens (mechanism)
Unknown
How to manage this interaction
Keep taking both medicines as prescribed unless your prescriber tells you otherwise. This is a manageable combination when your team is watching for it.
- Your care team may monitor you more closely for constipation and urinary retention, especially early on.
- Doses may be adjusted and individualized by your team if symptoms appear.
- They may suggest steps to keep your bowels moving (fluids, fiber, or a stool softener if your clinician recommends one).
Call your pharmacist or doctor if you notice belly pain or swelling, no bowel movement for a few days, or trouble urinating.
Management is individual — confirm any change with your pharmacist or prescriber.
Common questions
Can I take Trospium / Xanomeline and Oliceridine together?
Combining oliceridine with trospium (in Cobenfy) can add up to worse constipation and trouble urinating, so watch for these symptoms and tell your care team, who can adjust and monitor as needed. Always confirm with your pharmacist or prescriber before making any change.
How serious is the Trospium / Xanomeline and Oliceridine 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 Oliceridine interaction managed?
Keep taking both medicines as prescribed unless your prescriber tells you otherwise. This is a manageable combination when your team is watching for it. Your care team may monitor you more closely for constipation and urinary retention, especially early on. Doses may be adjusted and individualized by your team if symptoms appear. They may suggest steps to keep your bowels moving (fluids, fiber, or… 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 Oliceridine 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: OLINVYK(R) intravenous injection, oliceridine intravenous injection. Trevena Inc (per FDA), Chesterbrook, PA, 2023. DailyMed
Keep reading about Oliceridine
Keep reading about Trospium / Xanomeline
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