Amphetamine 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
Amphetamine
Buprenorphine
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 amphetamine (a stimulant) and buprenorphine (used for pain or opioid treatment). Both can raise the activity of a brain chemical called serotonin. When two medicines do this together, there's a small chance serotonin can build up too much and cause a reaction called serotonin syndrome.
Warning signs include feeling agitated or shaky, a racing heart, sweating, high fever, muscle twitching, or confusion. This is mostly a theoretical concern, meaning it's based on how the drugs work rather than lots of real-world cases. The good news is your care team can manage this by starting low, watching you closely, and adjusting as needed. Keep taking both as prescribed and call your doctor if you feel these symptoms.
Effect: Additive serotonergic activity may increase the risk of serotonin syndrome when amphetamine and buprenorphine are combined. Possible sustained increases in central d-amphetamine concentrations and potentiated cardiovascular effects are also noted.
- Mechanism: Pharmacodynamic (additive serotonergic effect); neither agent is meaningfully prodrug-dependent here.
- Direction: Increased serotonergic tone / increased amphetamine effect.
- Evidence: Theoretical; severity rated major.
- Onset: Unspecified; risk highest at initiation and dose titration.
- Management: If co-use is required, initiate at lower doses, monitor closely (mental status, autonomic signs, neuromuscular findings, cardiovascular parameters). Discontinue both 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 agent acts on the serotonergic neurotransmitter system12. Beyond this, brain levels of d-amphetamine may remain elevated for a prolonged period, and cardiovascular effects may be intensified 1. When clinical circumstances require using an amphetamine alongside such an agent, therapy should begin at reduced doses with close patient observation, particularly when treatment is started and when the dose is being adjusted. Should serotonin syndrome be suspected, both medications should be stopped 32.
Why it happens (mechanism)
Additive serotonergic effects
How to manage this interaction
If your care team decides you need both medicines, they can manage this safely:
- They may start at a lower dose and adjust it, individualized to you.
- They may monitor you more closely, especially when first starting or changing a dose.
- Keep taking both exactly as prescribed. Do not stop or change doses on your own.
Tell your pharmacist or doctor right away if you notice agitation, fast heartbeat, sweating, fever, shivering, muscle twitching, or confusion. If serotonin syndrome is suspected, your prescriber may stop both drugs. Bring up any new symptoms or medication changes at your next visit.
Management is individual — confirm any change with your pharmacist or prescriber.
Common questions
Can I take Amphetamine and Buprenorphine together?
Combining amphetamine and buprenorphine carries a theoretical risk of serotonin syndrome, so your care team may start low and watch you closely. Keep taking both as prescribed and report agitation, rapid heartbeat, fever, sweating, or muscle twitching promptly. Always confirm with your pharmacist or prescriber before making any change.
How serious is the Amphetamine 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 Amphetamine and Buprenorphine interaction managed?
If your care team decides you need both medicines, they can manage this safely: They may start at a lower dose and adjust it, individualized to you. They may monitor you more closely, especially when first starting or changing a dose. Keep taking both exactly as prescribed. Do not stop or change doses on your own. Tell your pharmacist or doctor right away if you notice agitation, fast heartbeat, s… 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 Amphetamine 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 (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 Amphetamine
Keep reading about Buprenorphine
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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