Buprenorphine and Clonidine: 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
Clonidine
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.
Both of these medicines can make you drowsy. Buprenorphine is an opioid used for pain or opioid dependence, and clonidine lowers blood pressure and can also calm the nervous system. When you take them together, their calming effects can add up. That means you might feel more sleepy, foggy, or less alert than you would with either one alone.
This concern is based mostly on how these drugs work rather than on strong studies, so please don't worry. Your care team can manage this safely by adjusting doses and keeping a closer eye on how you feel. Let them know if you notice extra drowsiness or dizziness.
Mechanism: additive CNS depression. Both agents are CNS depressants (buprenorphine is a partial mu-opioid agonist; clonidine is a central alpha-2 agonist), producing overlapping pharmacodynamic sedation. This is a PD interaction, not PK; neither drug is a prodrug here.
- Direction: increased sedation/somnolence (additive)
- Evidence: theoretical
- Onset: unspecified
- Severity: moderate
Management: The documented recommendation is to avoid concomitant use given potentiated sedation. If used together, individualize dosing, monitor sedation level, respiratory status, and blood pressure, and counsel on additive CNS depression. Escalate concern with any excessive somnolence or respiratory depression.
What happens
An increased risk of sedation and somnolence
Interaction Deep Dive
Do not use cloNIDine together with other CNS depressants1, since doing so can enhance the sedating effects12.
Why it happens (mechanism)
Additive sedative effects
How to manage this interaction
Keep taking both medicines as prescribed unless your doctor or pharmacist tells you otherwise. Never start or stop either one on your own.
- The recorded guidance is to avoid using these together when possible because of added drowsiness, so ask your prescriber whether both are truly needed.
- If you do take both, your team may adjust and individualize your doses and monitor you more closely.
- Tell your care team if you feel unusually sleepy, dizzy, or lightheaded, or if you notice slowed breathing.
- Avoid alcohol and other sedating medicines, which add to the effect.
Management is individual — confirm any change with your pharmacist or prescriber.
Common questions
Can I take Buprenorphine and Clonidine together?
Taking buprenorphine and clonidine together can add up to make you extra drowsy, so your care team may prefer to avoid the combination or watch you closely. Report any unusual sleepiness or dizziness to your pharmacist or doctor. Always confirm with your pharmacist or prescriber before making any change.
How serious is the Buprenorphine and Clonidine interaction?
It is rated moderate. Can be significant — usually manageable with 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 Clonidine interaction managed?
Keep taking both medicines as prescribed unless your doctor or pharmacist tells you otherwise. Never start or stop either one on your own. The recorded guidance is to avoid using these together when possible because of added drowsiness, so ask your prescriber whether both are truly needed. If you do take both, your team may adjust and individualize your doses and monitor you more closely. Tell you… 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.
From our Q&A
Real reader questions about these medications, each personally answered by our pharmacist:
Questions for your pharmacist
- Does my dose of Buprenorphine or Clonidine 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 anything you'd monitor while I'm on both?
References (2)
- Product Information: ONYDA(TM) XR extended release suspension, clonidine hydrochloride extended release suspension. Tris Pharma, Inc (Per FDA), Monmouth Junction, NJ, 2024.
- Product Information: NEXICLON(TM) XR extended-release oral tablets, clonidine extended-release oral tablets. Athena Bioscience, LLC (per DailyMed), Athens, GA, 2022. DailyMed
Keep reading about Buprenorphine
Keep reading about Clonidine
These medications also interact with supplements
Prescription drugs aren't the whole picture — herbal and dietary supplements can interact with them too. From the evidence-graded Natural Medicines database:
major · moderate · minor — check everything you take with our drug–supplement interaction checker.
Check another combination
Our instant two-drug interaction checker is almost here.
Still have questions about this combination?
Every question gets a real answer from a licensed pharmacist — free, and usually within a day.
Ask the pharmacist