Comparison

Ketamine vs MDMA-assisted therapy (research-stage)

MDMA-assisted therapy is investigational and primarily studied for PTSD. Ketamine is clinically available and used for depression, with growing PTSD research.

Written by: Ira ZootMedical review status: Not yet clinically reviewed.Last updated: June 4, 2026Evidence: Educational synthesis - not medical advice

This page has been written and edited by the publisher. It has not been reviewed by a licensed clinician.

Quick answer

Bottom line

MDMA-assisted therapy is not yet broadly available. Ketamine is. Both are best considered within structured clinical care, not self-administered.

This page compares Ketamine and MDMA-assisted therapy across the same fixed dimensions - mechanism, evidence, onset, duration, side effects, access, suitability, and limits. It does not name a winner and does not recommend either option for you.

Related on Ketalux

Ketamine

MDMA-assisted therapy

Mechanism

NMDA-receptor antagonism.

Serotonin, norepinephrine, and oxytocin release; reduced amygdala reactivity.

Evidence

Established for TRD; emerging for PTSD.

Phase 3 PTSD trials; regulatory path evolving.

Onset

Hours to days.

Course of 2-3 sessions paired with therapy.

Duration

Days to weeks per session.

Months after a completed course in studies.

Side effects

Dissociation, BP changes.

Jaw clenching, fatigue, mood changes post-session; cardiovascular caution.

Access

Clinics today.

Research and expanded-access programs only as of mid-2026.

Best for

Depression, certain PTSD presentations under clinical care.

PTSD in research contexts, paired with structured therapy.

Limits

Variable durability.

Legal status, scarce access.

Disclaimer

This comparison is educational and general. It is not a recommendation. Treatment choice depends on your individual history, diagnosis, prior response, preferences, and access - discuss with a qualified clinician.

About the author

Ira Zoot

Publisher and editor of Ketalux, based in Chicago, Illinois. Ira is a ketamine therapy patient, not a clinician. This is editorial review, not medical review: Ira is not a licensed clinician and does not provide diagnosis or medical care. Ketalux does not accept compensation from providers in exchange for favorable editorial coverage, evidence ratings, recommendations, patient referrals, or organic provider ranking. Read the full publisher disclosure →

Educational use only. The content on this page is provided for general educational purposes and does not constitute medical advice, diagnosis, or treatment. Ketamine and related therapies carry risks and are appropriate only under qualified medical supervision. Always consult a licensed healthcare professional about your individual situation. Information may change as research evolves.