NutriStack
MDMA and Sertraline, contraindicated.
MDMA causes massive serotonin release by reversing the serotonin transporter (SERT), and sertraline blocks SERT — the same protein MDMA needs to function. Combining them can blunt MDMA's intended effect while still flooding the synapse with serotonin, producing potentially fatal serotonin syndrome with hyperthermia, seizures, and cardiovascular collapse. Cases in adolescents on SSRIs are a documented danger.
One pair, every claim cited. The two substances, the type, the mechanism, the recommendation, and the primary literature.
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At a glance
- Substances
- MDMA and Sertraline
- Pair type
- Contraindicated
- Evidence (highest tier)
- Moderate
- Source citations
- 2 sources
- Stack Score effect
- −25 to your Stack Score (per scored contraindication row).
- Scope
- Supplement × Prescription
- Last verified
- May 30, 2026
Contraindicated · Moderate evidence
Contraindicated
What is happening. MDMA causes massive serotonin release by reversing the serotonin transporter (SERT), and sertraline blocks SERT — the same protein MDMA needs to function. Combining them can blunt MDMA's intended effect while still flooding the synapse with serotonin, producing potentially fatal serotonin syndrome with hyperthermia, seizures, and cardiovascular collapse. Cases in adolescents on SSRIs are a documented danger.
Mechanism. MDMA produces serotonergic effects by entering the presynaptic neuron via SERT and triggering reverse transport of vesicular 5-HT into the synapse. SSRIs occupy and inhibit SERT, blunting MDMA's intended release while still permitting massive cumulative serotonergic load and hyperthermia.
Recommendation. Do not combine MDMA with sertraline. If you are prescribed sertraline, treat MDMA as off-limits. Even after stopping sertraline, wait at least 1-2 weeks before any MDMA exposure.
Sources (2)
- Dobry Y, Rice T, Sher L. Ecstasy use and serotonin syndrome: a neglected danger to adolescents and young adults prescribed selective serotonin reuptake inhibitors. Int J Adolesc Med Health. 2013;25(3):193-9. PMID 24006318
- Green AR, Mechan AO, Elliott JM, O'Shea E, Colado MI. The pharmacology and clinical pharmacology of 3,4-methylenedioxymethamphetamine (MDMA, 'ecstasy'). Pharmacol Rev. 2003;55(3):463-508. PMID 12869661
Stack Score
How this pair moves the number.
Effect on the composite score
If both MDMA and Sertraline are in the same stack, this pair applies −25 to your Stack Score (per scored contraindication row).
The full algorithm, the clamping rules, and four worked stacks are documented at /methodology/stack-score.
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