Buprenorphine and Levodopa: 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
Levodopa
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.
What's going on: Buprenorphine is a strong opioid pain and addiction medicine that can make you sleepy, slow your breathing, and lower your alertness. Levodopa (used for Parkinson's symptoms) can also cause drowsiness or dizziness in some people. Taken together, these calming effects can add up, so you might feel more sleepy, foggy, or lightheaded than usual.
The good news is this is a theoretical concern, meaning it's based on how the drugs work rather than lots of real-world reports. Many people take medicines like these together safely. Your care team can manage this by watching how you feel and adjusting things if needed. If you notice heavy drowsiness or trouble staying awake, let your pharmacist or doctor know.
Mechanism: Additive CNS depression. Buprenorphine is a partial mu-opioid agonist with sedative and respiratory-depressant potential; levodopa can contribute CNS depressant/sedating effects (somnolence, dizziness). Neither is a prodrug relevant to this PD interaction, so the effect is pharmacodynamic (additive), not pharmacokinetic.
- Direction: Increased CNS/respiratory depression risk.
- Onset: Unspecified.
- Evidence: Theoretical.
- Magnitude: Not quantified.
- Management: Use caution when combined. Monitor sedation level, respiratory status, and mental status, particularly at initiation or dose changes. Dose may need individualization by the care team; counsel on additive sedation with other CNS depressants (alcohol, benzodiazepines).
What happens
An increased risk of CNS depression
Interaction Deep Dive
Giving foscarbidopa/foslevodopa together with CNS depressants may heighten the likelihood of CNS depression. Caution should be used when these are administered concurrently1.
Why it happens (mechanism)
Additive CNS depression
How to manage this interaction
How to manage this safely:
- Keep taking both medicines exactly as prescribed unless your doctor tells you otherwise. Do not start or stop either on your own.
- Your care team may watch you more closely and can adjust and individualize your doses if needed, especially when either medication is started or changed.
- Watch for excess drowsiness, confusion, dizziness, or slowed breathing, and avoid alcohol or other sedating medicines unless cleared by your team.
- Tell your pharmacist or prescriber if you feel unusually sleepy or hard to wake, and make sure they have your full medication list.
Management is individual — confirm any change with your pharmacist or prescriber.
Literature reports
2 reports — tap to read
Common questions
Can I take Buprenorphine and Levodopa together?
Combining buprenorphine and levodopa may add up to more drowsiness and sedation, so keep taking both as prescribed but tell your care team if you feel unusually sleepy or slowed down. This is a theoretical, additive effect your team can manage with monitoring. Always confirm with your pharmacist or prescriber before making any change.
How serious is the Buprenorphine and Levodopa 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 Levodopa interaction managed?
How to manage this safely: Keep taking both medicines exactly as prescribed unless your doctor tells you otherwise. Do not start or stop either on your own. Your care team may watch you more closely and can adjust and individualize your doses if needed, especially when either medication is started or changed. Watch for excess drowsiness, confusion, dizziness, or slowed breathing, and avoid alcohol… 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 Levodopa 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 (3)
- Product Information: VYALEV(TM) subcutaneous injection, foscarbidopa and foslevodopa subcutaneous injection. AbbVie Inc (per FDA), North Chicago, IL, 2024. DailyMed
- Product Information: Eunerpan(R), Melperonhydrochlorid. Nordmark Arzneimittel GmbH, Uetersen, 1991.
- Product Information: Nipolept(R), zotepine. Klinge Pharma GmbH, Munich, Germany, 1994.
Keep reading about Buprenorphine
Keep reading about Levodopa
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.
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