Umeclidinium and Buprenorphine: 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
Buprenorphine
Umeclidinium
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.
Buprenorphine is a pain and opioid medicine that can slow down your gut and make you constipated. Umeclidinium is an inhaled medicine for breathing problems (COPD). It belongs to a group called anticholinergics, which can also slow the gut and make it harder to empty your bladder.
Used together, these two effects can add up. In rare cases, the gut can slow down so much that it nearly stops moving (called paralytic ileus), or you may have trouble urinating. This is a theoretical concern, meaning it is a possible risk rather than something proven to happen often. Watch for bad constipation, belly bloating or pain, or trouble peeing, and let your care team know. They can manage this easily.
Mechanism: additive reduction in GI motility. Buprenorphine (opioid, mu-agonist) slows gut transit, and umeclidinium (inhaled long-acting muscarinic antagonist) contributes anticholinergic effects on smooth muscle and the bladder. Neither is a prodrug relevant here; effect is pharmacodynamic (additive), not a PK/metabolic interaction.
- Direction: additive constipating and urinary-retention effects.
- Outcome: severe constipation, possible paralytic ileus, urinary retention.
- Evidence: theoretical; systemic exposure to inhaled umeclidinium is low, likely limiting real-world risk.
- Severity/onset: major; onset unspecified.
- Management: monitor for reduced gastric motility (abdominal distension, absent bowel sounds, obstipation) and urinary retention; ensure bowel regimen; individualize as needed.
What happens
An increased risk of paralytic ileus
Interaction Deep Dive
When buprenorphine is given together with an anticholinergic agent, the combination may lead to urinary retention or severe constipation that progresses to paralytic ileus. Patients receiving buprenorphine alongside anticholinergic drugs should be monitored for indications of urinary retention or diminished gastric motility1.
Why it happens (mechanism)
Additive effects on gastric motility
How to manage this interaction
Good news: this is usually manageable, and both medicines can typically be continued as prescribed. Your care team may simply keep a closer eye on your bowel and bladder function.
- Keep taking both exactly as prescribed unless your prescriber tells you otherwise.
- Watch for warning signs: severe or worsening constipation, bloating, belly pain, no bowel movements, nausea, or trouble urinating.
- Report any of these to your pharmacist or prescriber promptly.
- Your team may suggest a bowel routine (fluids, fiber, or a stool softener/laxative if appropriate) and monitor you more closely.
Management is individual — confirm any change with your pharmacist or prescriber.
Common questions
Can I take Umeclidinium and Buprenorphine together?
Taking buprenorphine with umeclidinium may add up to worsen constipation or urinary retention, and rarely a stalled gut (paralytic ileus). Keep both as prescribed, watch for severe constipation, bloating, belly pain, or trouble urinating, and tell your care team if they happen. Always confirm with your pharmacist or prescriber before making any change.
How serious is the Umeclidinium and Buprenorphine 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 Umeclidinium and Buprenorphine interaction managed?
Good news: this is usually manageable, and both medicines can typically be continued as prescribed. Your care team may simply keep a closer eye on your bowel and bladder function. Keep taking both exactly as prescribed unless your prescriber tells you otherwise. Watch for warning signs: severe or worsening constipation, bloating, belly pain, no bowel movements, nausea, or trouble urinating. Report… 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 Umeclidinium or Buprenorphine 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: BRIXADI(TM) subcutaneous extended-release injection, buprenorphine subcutaneous extended-release injection. Braeburn Inc (per FDA), Plymouth Meeting, PA, 2023. DailyMed
Keep reading about Buprenorphine
Keep reading about Umeclidinium
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