A study, which an NPR article calls "rigorous," but also includes some red flags from psychedelic researchers, shows that people who were given enough LSD to experience "what people might call a trip" experienced a reduction in anxiety.

"By the next day, they were showing strong improvements," says Dr. David Feifel of Kadima Neuropsychiatry Institute in San Diego, one of the 22 centers that participated in the study. "And those improvements held out all the way to the end of the study, which was 12 weeks."

But it's unclear whether some of the improvement was related to non-drug factors like the sensory environment in which people were treated, says Robin Carhart-Harris, a psychedelics researcher at the University of California, San Francisco who was not involved in the study…

…Carhart-H

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