Trospium / Xanomeline and Glucagon: 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
Trospium / Xanomeline
Glucagon
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.
Your medication Cobenfy contains trospium, which has an anticholinergic effect. One of the things this does is slow down how your gut moves. Glucagon, when it is used to help with certain imaging tests or procedures, also slows the gut down on purpose.
When both are working at the same time, those effects can stack up. That may mean more constipation, bloating, or belly discomfort than usual. The good news is this is based on how the drugs work in theory, not on lots of real cases. Please let your care team know you take Cobenfy before any test that uses glucagon, so they can plan around it.
Effect: Additive inhibition of GI motility, increasing risk of GI adverse reactions (constipation, ileus-type symptoms).
Mechanism: Trospium (component of Cobenfy) is a muscarinic antagonist that reduces GI motility; glucagon used as a diagnostic aid also relaxes/slows GI smooth muscle. Effects are pharmacodynamically additive. Neither agent's effect depends on prodrug activation here.
- Direction: Increased GI adverse effects (additive PD).
- Onset: Unspecified.
- Evidence: Theoretical.
- Severity: Major.
Management: Concomitant use of glucagon as a diagnostic aid with anticholinergics is not recommended. If unavoidable, monitor for GI symptoms.
What happens
Increased risk of gastrointestinal side effects
Interaction Deep Dive
It is advised against using glucagon as a diagnostic aid together with anticholinergics. When glucagon is combined with anticholinergics, the likelihood of gastrointestinal adverse reactions may rise because the two produce additive effects that suppress gastrointestinal motility12.
Why it happens (mechanism)
Additive effects on inhibition of gastrointestinal motility
How to manage this interaction
Keep taking your Cobenfy (trospium/xanomeline) as prescribed. The point to act on is around diagnostic procedures that use glucagon.
- Tell the ordering clinician and pharmacist you take an anticholinergic (Cobenfy) before any imaging or scope test that may use glucagon.
- The care team may choose an alternative approach for the test, since combining these is generally not recommended.
- If both are used, your team may monitor you more closely for gut symptoms like constipation, bloating, or severe belly pain.
Report any significant abdominal pain or trouble passing stool to your care team.
Management is individual — confirm any change with your pharmacist or prescriber.
Common questions
Can I take Trospium / Xanomeline and Glucagon together?
Combining Cobenfy (trospium) with glucagon used as a diagnostic aid can stack up gut-slowing effects and is generally not recommended; tell your care team about Cobenfy before any test that uses glucagon. Always confirm with your pharmacist or prescriber before making any change.
How serious is the Trospium / Xanomeline and Glucagon 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 Glucagon interaction managed?
Keep taking your Cobenfy (trospium/xanomeline) as prescribed. The point to act on is around diagnostic procedures that use glucagon. Tell the ordering clinician and pharmacist you take an anticholinergic (Cobenfy) before any imaging or scope test that may use glucagon. The care team may choose an alternative approach for the test, since combining these is generally not recommended. If both are use… 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 Glucagon 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: GlucaGen(R) subcutaneous, intramuscular, intravenous injection, glucagon subcutaneous, intramuscular, intravenous injection. Boehringer Ingelheim Pharmaceuticals Inc (per FDA), Ridgefield, CT, 2021. DailyMed
- Product Information: GVOKE subcutaneous injection, intravenous injection, glucagon subcutaneous injection, intravenous injection. Xeris Pharmaceuticals Inc (per FDA), Chicago, IL, 2025. DailyMed
Keep reading about Trospium / Xanomeline
Keep reading about Glucagon
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