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Interaction · 2026

Mixing LSD and MDMA.

Is LSD + MDMA safe? Quick answer below, then mechanism, concrete risks, what to do if you already mixed, and sources.

CautionLSD + MDMA

Mild interaction. Reduce both doses if combined.

Substâncias relacionadas

ProfileLSDDosage, effects, testing, legal statusProfileMDMADosage, effects, testing, legal statusToolCheck any other pairInteractive multi-substance checker

Other common combos

alcohol + mdmacocaine + mdmacannabis + mdmaketamine + mdmaalcohol + cocainecannabis + cocaine

FAQ.

Can I mix LSD and MDMA?
The LSD + MDMA combination is classified as caution in our reference data. Read the mechanism and risks section above before deciding.
Is LSD and MDMA safe?
No combination is universally safe. This pair sits at the "Caution" level — see the risks list above for concrete adverse effects to watch for, and the harm-reduction section for what to do if you've already combined.
What happens if you take LSD and MDMA together?
Effects depend on dose, route, individual sensitivity and what else is on board. The mechanism section above explains the pharmacological interaction; the risks section lists the most-reported adverse outcomes.
How long should I wait between LSD and MDMA?
Generally: wait until the first substance has fully cleared (offset + after-effects done) before redosing or combining. For most pairs that's 6–24 hours; for long-acting compounds (MAOIs, SSRIs, some opioids) it can be days to weeks. Check each substance's individual profile page for exact durations.