Buprenorphine and Propiverine: 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
Propiverine
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.
Here's what's going on. Buprenorphine is an opioid pain and addiction medicine, and one of its common side effects is constipation. Propiverine treats an overactive bladder, and it can also slow down your gut and make it harder to empty your bladder. When you take both, those effects can add up.
In rare cases, the gut can slow down so much that it nearly stops, which doctors call paralytic ileus, and urine can back up too. This is a theoretical concern, not something proven to happen often. The good news is your care team can watch for it and manage it. Just tell them if you notice bad constipation, belly pain and bloating, or trouble urinating.
Interaction: Additive antimotility/anticholinergic effects when buprenorphine (opioid) is combined with propiverine (antimuscarinic for overactive bladder).
- Direction/effect: Increased risk of severe constipation and urinary retention, potentially progressing to paralytic ileus (pharmacodynamic, additive).
- Mechanism: Both reduce GI motility; opioid plus anticholinergic burden compounds this.
- Evidence: Theoretical; severity rated major. Onset unspecified.
- Management: Monitor for reduced gastric motility (abdominal distension, obstipation) and urinary retention. Ensure adequate bowel regimen/hydration. Doses may be individualized and patients monitored more closely by the care team.
Neither agent's activity here depends on metabolic activation; this is a purely additive PD interaction.
What happens
An increased risk of paralytic ileus
Interaction Deep Dive
Using buprenorphine together with an anticholinergic drug can lead to urinary retention or severe constipation that progresses to paralytic ileus. When these agents are given concurrently, watch patients for indications of urinary retention or decreased gastric motility1.
Why it happens (mechanism)
Additive effects on gastric motility
How to manage this interaction
Keep taking both medicines as prescribed unless your prescriber tells you otherwise. This interaction is usually manageable with awareness and monitoring.
- Your care team may monitor you more closely for constipation and bladder problems, and doses may be adjusted and individualized if needed.
- Stay well hydrated and stay active as you're able, which helps keep your gut moving.
- Contact your pharmacist or doctor promptly if you have severe constipation, belly bloating or pain, no bowel movement for several days, nausea/vomiting, or trouble passing urine.
- Ask your pharmacist before adding any other medicine that can cause constipation.
Management is individual — confirm any change with your pharmacist or prescriber.
Common questions
Can I take Buprenorphine and Propiverine together?
Taking buprenorphine with propiverine can add up to cause severe constipation or urinary retention, and rarely a stalled gut (paralytic ileus). Watch for these symptoms and report them to your care team, who can monitor you and adjust treatment. Always confirm with your pharmacist or prescriber before making any change.
How serious is the Buprenorphine and Propiverine 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 Buprenorphine and Propiverine interaction managed?
Keep taking both medicines as prescribed unless your prescriber tells you otherwise. This interaction is usually manageable with awareness and monitoring. Your care team may monitor you more closely for constipation and bladder problems, and doses may be adjusted and individualized if needed. Stay well hydrated and stay active as you're able, which helps keep your gut moving. Contact your pharmaci… 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 Buprenorphine or Propiverine 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 Propiverine
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Prescription drugs aren't the whole picture — herbal and dietary supplements can interact with them too. From the evidence-graded Natural Medicines database:
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