Cannabidiol 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
Cannabidiol
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 slow down your brain and body. Buprenorphine is an opioid used for pain or opioid dependence, and cannabidiol (Epidiolex) is used mainly for certain seizures. Each one can make you feel sleepy or foggy on its own. When taken together, that drowsy, slowed-down feeling can add up, so you may feel more sedated or sleepy than usual.
This is a caution based on how the two drugs work, not on a lot of real-world reports. The good news is your care team can manage it easily. Until you know how the combination affects you, avoid driving or using machinery, and let your pharmacist or doctor know if you feel very sleepy.
Effect: Additive CNS depression with increased risk of sedation and somnolence when buprenorphine (opioid) is combined with cannabidiol.
Mechanism: Pharmacodynamic (additive), not pharmacokinetic. Both agents independently depress the CNS.
- Direction: Increased combined sedative effect.
- Onset: Unspecified.
- Evidence: Theoretical; severity rated major.
- Management: Monitor for somnolence and sedation. Counsel against driving or operating machinery until tolerance to cannabidiol is established. Dose may be individualized by the care team and closer monitoring applied, particularly with respiratory or cognitive concerns.
What happens
Increased risk of CNS depression and an increased risk of sedation and somnolence
Interaction Deep Dive
Using cannabidiol, a CNS depressant, together with a different CNS depressant can heighten the likelihood of somnolence and sedation. Watch patients for sedation and somnolence, and instruct them to refrain from driving or operating machinery until they have acquired adequate experience with cannabidiol1.
Why it happens (mechanism)
Additive CNS depression
How to manage this interaction
Your care team can manage this combination safely.
- Keep taking both as prescribed unless your doctor or pharmacist tells you otherwise.
- Watch for drowsiness or unusual sleepiness, especially when you first start or change either medicine.
- Do not drive or use machinery until you know how the combination affects you.
- Your doses may be adjusted and individualized by your care team, and they may monitor you more closely.
- Tell your pharmacist or prescriber if you feel very sleepy, foggy, or have trouble breathing.
Management is individual — confirm any change with your pharmacist or prescriber.
Common questions
Can I take Cannabidiol and Buprenorphine together?
Taking buprenorphine and cannabidiol together can add up to more sleepiness and slowed thinking, so avoid driving until you know how you react and let your care team adjust and monitor as needed. Always confirm with your pharmacist or prescriber before making any change.
How serious is the Cannabidiol 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 Cannabidiol and Buprenorphine interaction managed?
Your care team can manage this combination safely. Keep taking both as prescribed unless your doctor or pharmacist tells you otherwise. Watch for drowsiness or unusual sleepiness, especially when you first start or change either medicine. Do not drive or use machinery until you know how the combination affects you. Your doses may be adjusted and individualized by your care team, and they may monit… 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 Cannabidiol 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: EPIDIOLEX(R) oral solution, cannabidiol oral solution. Jazz Pharmaceuticals, Inc. (per FDA), Palo Alto, CA, 2025. DailyMed
Keep reading about Buprenorphine
Keep reading about Cannabidiol
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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:
major · moderate · minor — check everything you take with our drug–supplement interaction checker.
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