Citation Bureau
Vol. I
No. 421
XX SEPTEMBER MMXXVI
Reference

What is MDMA?

MDMA

MDMA (3,4-methylenedioxy-methamphetamine) is a controlled psychedelic substance regulated as an unapproved therapeutic good in Australia, where it is listed under Schedule 8 of the Poisons Standard for use by specifically authorised psychiatrists in the treatment of post-traumatic stress disorder. The material tracks its clinical rollout in Australia and research into how social context shapes its effects.

How it developed

  • Sep 2026 - Gül Dölen said the length of the critical period opened after a psychedelic’s acute effects wear off is proportional to how long the trip lasts.
  • Sep 2026 - Dölen said giving MDMA in a social context reopens the social reward learning critical period in mice, but giving it in isolation does not.
  • Sep 2026 - Tania de Jong said Australia had reached 120 authorised prescribing psychiatrists for MDMA or psilocybin, up from one or two at the start of 2024.
  • Sep 2026 - De Jong said over 20 Australian clinics, mostly led by clinicians trained through her certificate in psychedelic assisted therapies, had treated roughly 400 patients.
  • Sep 2026 - De Jong said remission rates of 60 to 80% were reported for MDMA and psilocybin treatment of PTSD and depression, against 10 to 15% for existing treatments.

In the evidence

Every line below is attributed to a named speaker.

Best explained

The therapeutic window after a psychedelic trip scales with trip duration: ketamine (30-60 min trip) reopens a critical period for 48 hours, MDMA and psilocybin (3-6 hr trip) for about 2 weeks, LSD (8-10 hr trip) for about 3 weeks, and ibogaine (2-3 day trip) for at least a month.

“How long the critical period stays open after the acute effects of the psychedelics have worn off is proportional to how long the trip is.”
Gül Dölen · 12 Sep 2026
Best explained

Set and setting matter neurobiologically: MDMA only reopens the social reward learning critical period in mice when given in a social context, not in isolation, explaining why recreational use in a rave does not produce the same therapeutic outcome as a clinical session.

“If we give MDMA for example in a social context, we can reopen the social reward learning critical period in mice. But if we give it in an isolation context, we don't open that critical period.”
Gül Dölen · 12 Sep 2026
By the numbers

Australia's authorized prescriber count for MDMA and/or psilocybin grew from 1 to 2 in early 2024 to 120 by mid-late 2026.

“We just found out that now there's 120 authorized prescribing psychiatrists in Australia for either MDMA or psilocybin or both medicines. So, that is a huge jump. You know, we started with one or two psychiatrists back at the start of 2024. We're now at the middle latter part of 2026.”
Tania de Jong · 19 Sep 2026
Contrarian take

fMRI studies attributing function to specific brain regions are misleading because the octopus MDMA finding shows complex social behavior can arise without a cortex, nucleus accumbens, amygdala, or brain stem, meaning the true mechanism is molecular, not regional.

“That tells us that all of these studies out there that are doing like fMRI brain imaging and saying, "Oh, look, I gave a psychedelic or I gave whatever. I had people play Tetris or whatever experiment they're doing. And look, this part of the brain lit up. That kind of inference about the mechanistic relationship between those brain regions and those functions is a little bit misleading. And that the true mechanism is really at the level of molecules.”
Gül Dölen · 12 Sep 2026
By the numbers

As of mid-late 2026, Australia has over 20 clinics and roughly 400 patients treated with psilocybin- and MDMA-assisted therapy, with no serious adverse events reported to the TGA.

“There's now over 20 clinics around Australia, mostly led by clinicians that we have trained through our certificate in psychedelic assisted therapies and over 400 patients or so roughly have been treated.”
Tania de Jong · 19 Sep 2026
By the numbers

MDMA-assisted therapy for PTSD showed a ~54% remission rate at end of treatment, rising to ~68% at 6-month follow-up.

“After the last administered medicine the remission rate was something like 54 and then 6 months later it climbed to 68.”
Tania de Jong · 19 Sep 2026
By the numbers

Real-world Australian data show 60 to 80% remission rates for MDMA/psilocybin treatments, compared to 10 to 15% for existing PTSD and depression treatments.

“These remission rates around 60 to 80% that's compared against 10 to 15% for existing treatments for PTSD and psilocybin with MDMA and psilocybin treatment for depression and trauma in Australia at the moment. So 10 to 15% versus 60 to 80% remission rates.”
Tania de Jong · 19 Sep 2026
Citation Bureau · reference note, compiled from attributed expert discussion. Last updated 2026-09-20.