Buprenorphine and Lisdexamfetamine: 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
Lisdexamfetamine
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.
You've been prescribed buprenorphine (a pain or opioid-dependence medicine) and lisdexamfetamine (Vyvanse, for ADHD). Both can gently raise a brain chemical called serotonin. When two medicines do this together, there is a small chance of a reaction called serotonin syndrome.
Signs to watch for include feeling agitated or restless, shaking, sweating, a fast heartbeat, fever, or muscle twitching. This concern is mostly theoretical, meaning it hasn't been proven often in real life, so try not to worry. Your care team can manage this safely, often by starting low and keeping an eye on you. If you feel unwell, reach out to them right away.
Effect: Additive serotonergic activity from buprenorphine plus lisdexamfetamine (a prodrug of dextroamphetamine) may increase risk of serotonin syndrome. Amphetamines can also show sustained CNS d-amphetamine levels and potentiated cardiovascular effects.
- Mechanism: additive serotonergic effects (PD interaction).
- Direction: increased serotonergic/adrenergic effect.
- Evidence: theoretical; severity major; onset unspecified.
- Management: if coadministration is required, initiate at lower doses; monitor closely during initiation and titration for agitation, hyperthermia, tachycardia, clonus, hyperreflexia. Also monitor BP/HR. Discontinue both agents if serotonin syndrome is suspected.
What happens
An increased risk of serotonin syndrome
Interaction Deep Dive
Giving an amphetamine together with a second serotonergic drug can lead to serotonin syndrome, since each medication acts on the serotonergic neurotransmitter system12. On top of this, brain levels of d-amphetamine may remain elevated over time, and cardiovascular effects may be intensified1. When clinical circumstances make combined use of an amphetamine and one of these agents necessary, begin therapy at reduced doses and watch patients closely, particularly when starting treatment and when doses are being adjusted. Should serotonin syndrome be suspected, stop both medications32.
Why it happens (mechanism)
Additive serotonergic effects
How to manage this interaction
If your prescriber decides you need both, this is manageable with a careful approach.
- Keep taking both as prescribed unless your care team tells you otherwise. Do not start or stop either on your own.
- Your team may start at a lower dose and monitor you more closely, especially when beginning treatment or adjusting the dose.
- Watch for warning signs: agitation, confusion, sweating, shivering, muscle twitching, fast heartbeat, or fever.
- Get medical help promptly if these appear, and let your pharmacist or prescriber know both drugs are on your list so they can tailor and monitor your therapy.
Management is individual — confirm any change with your pharmacist or prescriber.
Common questions
Can I take Buprenorphine and Lisdexamfetamine together?
Using buprenorphine with lisdexamfetamine carries a theoretical but potentially serious risk of serotonin syndrome, so your care team may start low and monitor you closely. Watch for agitation, sweating, tremor, fast heartbeat, or fever, and seek help if they occur. Always confirm with your pharmacist or prescriber before making any change.
How serious is the Buprenorphine and Lisdexamfetamine 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 Lisdexamfetamine interaction managed?
If your prescriber decides you need both, this is manageable with a careful approach. Keep taking both as prescribed unless your care team tells you otherwise. Do not start or stop either on your own. Your team may start at a lower dose and monitor you more closely, especially when beginning treatment or adjusting the dose. Watch for warning signs: agitation, confusion, sweating, shivering, muscle… 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 Lisdexamfetamine 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: VYVANSE(R) oral capsules, oral chewable tablets, lisdexamfetamine dimesylate oral capsules, oral chewable tablets. Shire US Inc (per DailyMed), Lexington, MA, 2018. DailyMed
- Product Information: FETZIMA(R) oral extended-release capsules, levomilnacipran oral extended-release capsules. AbbVie Inc (per FDA), North Chicago, IL, 2023. DailyMed
- Product Information: ADDERALL(R) oral tablets, dextroamphetamine saccharate amphetamine aspartate dextroamphetamine sulfate amphetamine sulfate oral tablets. Teva Select Brands (per FDA), Horsham, PA, 2017. DailyMed
Keep reading about Buprenorphine
Keep reading about Lisdexamfetamine
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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