Buprenorphine and Magnesium Oxybate: 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
Magnesium Oxybate
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 slow down your brain and body. Buprenorphine is an opioid used for pain or opioid use disorder, and magnesium oxybate (Xywav) is a strong sleep and narcolepsy medicine. When you take them together, their calming effects can stack up. This can make you very sleepy, drop your blood pressure, slow your breathing, or in serious cases cause you to pass out.
The good news is your care team can manage this safely. Please don't stop or change either medicine on your own. Talk with your doctor or pharmacist so they can decide the safest plan for you, which may include adjusting a dose or watching you more closely.
Effect: Additive CNS and respiratory depression, hypotension, profound sedation, syncope, and potentially death.
Mechanism: Pharmacodynamic additive CNS depression (opioid agonist plus GABA-B/oxybate sedative). No prodrug relationship applies; the effect is PD, not PK.
- Direction: Increased combined depressant effect.
- Onset: Unspecified.
- Evidence: Theoretical; severity rated major.
Management: Combination generally not recommended. If required, consider dose reduction or discontinuation of one agent (including the oxybate). For short-term/perioperative opioid need, consider interrupting oxybate therapy. Monitor mental status and respiratory status; strongly consider prescribing naloxone.
What happens
An increased risk of CNS depression and clinically significant respiratory depression, obtundation, hypotension, profound sedation, syncope, and death
Interaction Deep Dive
Taking sodium oxybate or mixed oxybate salts together with other CNS depressants heightens the likelihood of additive CNS depression along with clinically meaningful respiratory depression, obtundation, hypotension, deep sedation, syncope, and death. If, nonetheless, combining these CNS depressants with an oxybate is necessary, clinicians should weigh reducing the dose of, or stopping, one or more of the CNS depressant(s), oxybates included. Moreover, when brief opioid use is needed (for example, post- or perioperatively), pausing oxybate therapy should be considered234. Where concurrent use cannot be avoided, watch for alterations in mental status and respiratory depression, proceed with caution in management, and give strong consideration to prescribing naloxone for emergency treatment of opioid overdose 1.
Why it happens (mechanism)
Additive CNS depression
How to manage this interaction
Keep taking both medicines exactly as prescribed unless your care team tells you otherwise. This combination is generally not recommended, so your team will decide how to handle it safely.
- Your team may reduce a dose or adjust one medicine, individualized to you.
- For short-term opioid needs (like after surgery), they may pause the oxybate.
- They may monitor you more closely for sleepiness or slowed breathing.
- Ask whether you should have naloxone on hand for emergencies.
Call your pharmacist or doctor right away if you feel very drowsy, confused, faint, or notice slow or shallow breathing.
Management is individual — confirm any change with your pharmacist or prescriber.
Common questions
Can I take Buprenorphine and Magnesium Oxybate together?
Combining buprenorphine and magnesium oxybate can dangerously stack their sedating effects and slow breathing, so this pairing is generally avoided. Do not change anything on your own; ask your doctor or pharmacist how to manage it and whether you should carry naloxone. Always confirm with your pharmacist or prescriber before making any change.
How serious is the Buprenorphine and Magnesium Oxybate 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 Magnesium Oxybate interaction managed?
Keep taking both medicines exactly as prescribed unless your care team tells you otherwise. This combination is generally not recommended, so your team will decide how to handle it safely. Your team may reduce a dose or adjust one medicine, individualized to you. For short-term opioid needs (like after surgery), they may pause the oxybate. They may monitor you more closely for sleepiness or slowed… 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 Magnesium Oxybate 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 (4)
- Product Information: SUBUTEX(R) sublingual tablets, buprenorphine sublingual tablets. Indivior Inc (per FDA), North Chesterfield, VA, 2021. DailyMed
- Product Information: XYWAV(R) oral solution, calcium, magnesium, potassium, sodium oxybates oral solution. Jazz Pharmaceuticals Inc (per manufacturer), Palo Alto, CA, 2023. DailyMed
- Product Information: XYREM(R) oral solution, sodium oxybate oral solution. Jazz Pharmaceuticals Inc (per manufacturer), Palo Alto, CA, 2023. DailyMed
- Product Information: LUMRYZ(TM) oral extended-release suspension, sodium oxybate extended-release suspension. Avadel CNS Phamaceuticals LLC (per FDA), Chesterfield, MO, 2024. DailyMed
Keep reading about Buprenorphine
Keep reading about Magnesium Oxybate
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