NutriStack
Desvenlafaxine and MDMA, contraindicated.
Desvenlafaxine blocks serotonin and norepinephrine reuptake, and MDMA forces serotonin and norepinephrine release through the same transporter systems. Combining them can blunt desired MDMA effects while increasing risk of serotonin syndrome, hyperthermia, blood pressure spikes, arrhythmia, and seizures. Risk is greater with dehydration, overheating, redosing, or other serotonergic substances.
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
- Desvenlafaxine and MDMA
- Pair type
- Contraindicated
- Evidence (highest tier)
- Moderate
- Source citations
- 3 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. Desvenlafaxine blocks serotonin and norepinephrine reuptake, and MDMA forces serotonin and norepinephrine release through the same transporter systems. Combining them can blunt desired MDMA effects while increasing risk of serotonin syndrome, hyperthermia, blood pressure spikes, arrhythmia, and seizures. Risk is greater with dehydration, overheating, redosing, or other serotonergic substances.
Mechanism. MDMA acts as a substrate at SERT and NET and promotes reverse monoamine transport. Desvenlafaxine inhibits SERT and NET, creating transporter competition and additive serotonergic and adrenergic stress.
Recommendation. Do not use MDMA while taking desvenlafaxine. Avoid redosing if MDMA effects feel reduced; blunting does not remove toxicity risk. Seek emergency care for high fever, clonus, confusion, severe agitation, chest pain, fainting, or severe headache.
Sources (3)
- Sarparast A, Thomas K, Malcolm B, Stauffer CS. Drug-drug interactions between psychiatric medications and MDMA or psilocybin: a systematic review. Psychopharmacology (Berl). 2022;239(6):1945-1976. PMID 35253070
- Makunts T, Jerome L, Abagyan R, de Boer A. Reported Cases of Serotonin Syndrome in MDMA Users in FAERS Database. Front Psychiatry. 2021;12:824288. PMID 35140642
- 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 Desvenlafaxine and MDMA 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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