Kratom and Amitriptyline: 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
Amitriptyline
Kratom
No brand names on record
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.
Amitriptyline (Elavil) raises serotonin levels in your body, and kratom also touches serotonin pathways along with several other receptors. When you use both, those effects can add up. In rare cases, too much serotonin can cause a reaction called serotonin syndrome, with symptoms like agitation, sweating, a fast heartbeat, shivering, muscle twitching, or confusion.
This concern is based on how the drugs work rather than a lot of reported cases, and kratom products vary a lot in strength, which makes them hard to predict. The good news is your care team can manage this by watching you closely. Please don't stop either one on your own, just talk with your pharmacist or doctor first.
Interaction: additive serotonergic effects between amitriptyline (a TCA that inhibits serotonin reuptake) and kratom, whose alkaloids (mitragynine, 7-hydroxymitragynine) act on opioid, adrenergic, and serotonergic receptors.
- Direction: increased serotonergic tone, raising risk of serotonin syndrome.
- Evidence: theoretical; unpredictable due to variable kratom alkaloid content.
- Severity/onset: major; onset unspecified.
- Management: counsel on serotonin syndrome signs (hyperthermia, clonus, hyperreflexia, agitation, autonomic instability). Monitor closely; dose may need to be individualized by the care team. Consider avoiding kratom given its unregulated potency.
What happens
An increased risk of serotonin syndrome
Interaction Deep Dive
Taking kratom together with a serotonergic drug can produce serious outcomes, including serotonin syndrome. Because kratom acts through multiple receptors (among them opioid, adrenergic, and serotonergic receptors) and because its alkaloid levels differ across formulations, predicting interactions with it is particularly difficult. Careful monitoring is recommended1.
Why it happens (mechanism)
Additive serotonergic effects
How to manage this interaction
Your care team can manage this by keeping a close eye on you when these are used together.
- Keep taking your amitriptyline as prescribed unless your doctor tells you otherwise.
- Tell your pharmacist and prescriber that you use or are considering kratom, so they know to monitor you more closely.
- Watch for warning signs: agitation, confusion, rapid heartbeat, heavy sweating, shivering, muscle twitching, or fever. Seek urgent care if these appear.
- Because kratom strength varies widely between products, it can be hard to predict. Your team may adjust and individualize your plan based on how you respond.
Management is individual — confirm any change with your pharmacist or prescriber.
Common questions
Can I take Kratom and Amitriptyline together?
Combining amitriptyline with kratom can add up their serotonin effects and, though the risk is mainly theoretical, could trigger serotonin syndrome. Let your pharmacist or doctor know so they can monitor you, and get urgent help for symptoms like agitation, fever, or a racing heart. Always confirm with your pharmacist or prescriber before making any change.
How serious is the Kratom and Amitriptyline 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 Kratom and Amitriptyline interaction managed?
Your care team can manage this by keeping a close eye on you when these are used together. Keep taking your amitriptyline as prescribed unless your doctor tells you otherwise. Tell your pharmacist and prescriber that you use or are considering kratom, so they know to monitor you more closely. Watch for warning signs: agitation, confusion, rapid heartbeat, heavy sweating, shivering, muscle twitchin… 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 Kratom or Amitriptyline 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)
- Dhoble LR, Gour A, McCurdy CR, et al: Evaluating the drug interactions in kratom usage: clinical application. Expert Opin Drug Metab Toxicol 2025; 21(8):949-959. PubMed
Keep reading about Amitriptyline
Keep reading about Kratom
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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