Frederick Barrett

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@FredBarrettPhD

Shih Yin Professor, Director @JHPsychedelics; he/him; I still call this place twitter, things here are tweets; content generated by an organic neural network

Baltimore, MD hopkinspsychedelic.org/barrett Joined April 2025

452 Following 313 Followers 287 Posts

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Frederick Barrett @FredBarrettPhD Aug 31

Excited to share our new paper in Psychopharmacology: A pilot study comparing high-dose oral Δ9-THC, psilocybin, and placebo under the same set and setting used in psychedelic clinical trials.

@JHPsychedelics 🧵

link.springer.com/article/10.100…

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link.springer.com Pilot study comparing the effects of high dose THC to high dose psilocybin and placebo in the set... Psychopharmacology - Delta-9-tetrahydrocannabinol (Δ9-THC) has been reported to evoke psychedelic-like experiences at high doses in some individuals. However, the doses of Δ9-THC that...

Frederick Barrett @FredBarrettPhD Oct 21

Very interesting survey of recreational experiences with MDMA. An important caveat is that “MDMA” in unregulated markets is often not just MDMA (or not MDMA at all; lnkd.in/e4RCWSHg). The question remains whether reported after-effects are actually due to MDMA.

lnkd.in LinkedIn This link will take you to a page that’s not on LinkedIn

Sean Goldy @SeanPGoldy Oct 21

‼️ New paper! MDMA "blue Mondays" & "suicide Tuesdays" are familiar phrases in recreational MDMA culture, describing low points in the days post-use. But do these aftereffects actually exist? Current research shows conflicting results. Thread👇

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Frederick Barrett @FredBarrettPhD Oct 21

#meta

Robin Carhart-Harris Verified account @RCarhartHarris Oct 20

I love these pages. Ego/shadow in science. Is it better or worse in psychedelic science?

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Frederick Barrett @FredBarrettPhD Oct 5

Amazing recognition for this remarkable discovery that has fueled modern neuroscience. Congratulations to all!!

The Nobel Prize Verified account @NobelPrize Oct 5

BREAKING NEWS
The 2026 #NobelPrize in Physiology or Medicine has been awarded to Karl Deisseroth, Peter Hegemann and Georg Nagel “for their discoveries concerning light-gated ion channels and optogenetics.”

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Frederick Barrett @FredBarrettPhD Sep 15

succinct summary of yesterday's highly anticipated FDA public hearing

Josh Hardman @Josh__Hardman Sep 15

Here's my write-up of yesterday's FDA Public Hearing

TL;DR:
- Nothing new shared
- Federal panellists sat silently
- Almost all comments were positive
- Seemed to be a fun day out for psychedelics advocates

(🔑 No paywall)
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