Buprenorphine and Clopamide: 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
Clopamide
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. You're taking buprenorphine (an opioid pain or addiction medicine) along with clopamide, a water pill (diuretic) that helps your body get rid of extra fluid and can lower blood pressure. Opioids can signal your body to hold onto more water by releasing a hormone that keeps fluid in. Because of that, your water pill may not work as well as expected.
The good news is this is easy for your care team to watch for. They may check how much fluid you're losing, watch your blood pressure and any swelling, and adjust your diuretic dose if needed. Keep taking both as prescribed and let your pharmacist or doctor know if you notice more swelling or your blood pressure creeping up.
Interaction: Buprenorphine may reduce the efficacy of clopamide (a thiazide-like diuretic).
- Mechanism: Opioid-induced release of antidiuretic hormone (ADH), promoting water retention and blunting the diuretic/antihypertensive response. This is a pharmacodynamic interaction, not CYP-mediated; neither agent's activation status alters the direction.
- Direction: Reduced diuretic effect.
- Evidence: Theoretical; severity rated major on file. Onset unspecified.
- Management: Monitor diuresis, fluid status, edema, and blood pressure. Titrate the diuretic dose as clinically indicated; individualize per response.
What happens
Reduced efficacy of diuretics
Interaction Deep Dive
Giving opioids such as buprenorphine together with diuretics may lessen how well the diuretics work, because opioids can trigger the release of antidiuretic hormone. Watch patients for indications of reduced diuresis and/or changes in blood pressure, and raise the diuretic dose when necessary1.
Why it happens (mechanism)
Induction of antidiuretic hormone release
How to manage this interaction
What your care team may do:
- Watch how well your water pill is working, checking your blood pressure, any swelling, and your fluid balance.
- Adjust the diuretic dose if needed. There isn't one fixed change; the dose may need to be individualized and tailored by your care team based on how you respond.
What you can do:
- Keep taking both medicines exactly as prescribed.
- Tell your pharmacist or doctor if you notice more swelling in your legs, sudden weight gain, or higher blood pressure readings.
Management is individual — confirm any change with your pharmacist or prescriber.
Common questions
Can I take Buprenorphine and Clopamide together?
Buprenorphine may make your diuretic (clopamide) work less well by causing fluid retention, so your care team may watch your blood pressure and swelling and adjust the diuretic dose. Keep taking both as prescribed and report any new swelling or rising blood pressure. Always confirm with your pharmacist or prescriber before making any change.
How serious is the Buprenorphine and Clopamide 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 Clopamide interaction managed?
What your care team may do: Watch how well your water pill is working, checking your blood pressure, any swelling, and your fluid balance. Adjust the diuretic dose if needed. There isn't one fixed change; the dose may need to be individualized and tailored by your care team based on how you respond. What you can do: Keep taking both medicines exactly as prescribed. Tell your pharmacist or doctor i… 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 Clopamide 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 Clopamide
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