Sertraline and Kratom: 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
Kratom
No brand names on recordSertraline
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.
Kratom and sertraline can be a risky combination. Sertraline (an antidepressant) raises a brain chemical called serotonin, and kratom also acts on serotonin. Together they can push serotonin too high, which can cause a serious problem called serotonin syndrome. Watch for agitation, a racing heart, sweating, shivering, muscle twitching, or a high fever.
On top of that, kratom can slow down how your body breaks down sertraline, so more of it may build up in your system, especially with higher kratom doses or regular use. The good news is your care team can manage this safely. Please tell your pharmacist or doctor that you use kratom so they can keep a close eye on you.
Direction: Additive serotonergic effect plus increased sertraline exposure.
- Mechanism: Kratom (mitragynine) inhibits CYP3A-mediated metabolism, raising CYP3A substrate exposure; sertraline is partly metabolized by CYP3A. Concurrent serotonergic activity from both agents is additive. Neither is a prodrug requiring activation.
- Effect: Increased risk of serotonin syndrome; potentially higher sertraline AUC, more pronounced with higher kratom doses or chronic use.
- Evidence: Probable; magnitude and onset unspecified. Variable kratom alkaloid content complicates prediction.
- Management: Close monitoring for serotonin toxicity (clonus, hyperreflexia, autonomic instability, mental status change). Individualize dosing; consider avoiding kratom.
What happens
Increased CYP3A substrate exposure and increased risk of serotonin syndrome
Interaction Deep Dive
Taking kratom together with a serotonergic drug can produce serious consequences, including serotonin syndrome 1. Kratom also acts as a CYP3A inhibitor, so it can raise the exposure of CYP3A substrates, an effect that is more pronounced at higher kratom doses or with long-term use 2. Because kratom works through several receptor types (opioid, adrenergic, and serotonergic among them) and its alkaloid concentration differs across formulations, predicting drug interactions is difficult. Close monitoring is advised 1.
Why it happens (mechanism)
Inhibition of CYP3A-mediated metabolism by kratom; additive serotonergic effects
How to manage this interaction
Keep taking your sertraline exactly as prescribed and do not stop it on your own. The most important step is to tell your care team you use kratom, since it is not a standardized product and its strength varies.
- Your team may monitor you more closely for signs of serotonin syndrome (agitation, fast heartbeat, sweating, shivering, muscle twitching, fever).
- Your sertraline dose may need to be adjusted and individualized by your care team, especially with higher or regular kratom use.
- Your team may also discuss whether avoiding kratom is the safest option.
Seek urgent care if you develop the symptoms above.
Management is individual — confirm any change with your pharmacist or prescriber.
Literature reports
1 report — tap to read
a) An open-label crossover study in healthy adults (N=12) assessed the intake of a single low dose of kratom tea (2 g) alongside oral midazolam (a CYP3A probe substrate; 2.5 mg) and oral dextromethorphan (a CYP2D6 probe substrate; 30 mg). Kratom produced a modest rise in the midazolam geometric mean AUC (1.39; 90% CI, 1.23 to 1.57) and Cmax (1.5; 90% CI, 1.32 to 1.7); dextromethorphan AUC and Cmax showed no change. The midazolam half life was not significantly changed with concurrent kratom use, which points to inhibition of first-pass metabolism, mainly intestinal CYP3A. The participants (median age, 30 years) had prior kratom exposure and agreed to refrain from concomitant medications and botanical or other natural products (including kratom) throughout the study 2.
Common questions
Can I take Sertraline and Kratom together?
Combining kratom with sertraline raises the risk of serotonin syndrome and can increase sertraline levels; keep taking your prescribed medicine and tell your pharmacist or doctor about kratom use so they can monitor you and adjust as needed. Always confirm with your pharmacist or prescriber before making any change.
How serious is the Sertraline and Kratom 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 Sertraline and Kratom interaction managed?
Keep taking your sertraline exactly as prescribed and do not stop it on your own. The most important step is to tell your care team you use kratom, since it is not a standardized product and its strength varies. Your team may monitor you more closely for signs of serotonin syndrome (agitation, fast heartbeat, sweating, shivering, muscle twitching, fever). Your sertraline dose may need to be adjust… Management is individual — always follow your own care team's guidance.
How strong is the evidence for this interaction?
The evidence is graded "probable". Good supporting evidence, though not definitively proven.
From our Q&A
Real reader questions about these medications, each personally answered by our pharmacist:
Questions for your pharmacist
- Does my dose of Sertraline or Kratom 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 (2)
- 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
- Tanna RS, Nguyen JT, Hadi DL, et al: Clinical assessment of the drug interaction potential of the psychotropic natural product kratom. Clin Pharmacol Ther 2023; 113(6):1315-1325. PubMed
Keep reading about Kratom
Keep reading about Sertraline
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