Call LSD ‘neurotoxic’ in a psychedelic community and see how far that gets you. You’ll probably evoke some laughter, maybe some scorn, but not much else.
For the millions of people who take LSD and similar psychedelics every year, and the tens of millions who have taken LSD since its explosion into mainstream culture in the 1960s, LSD is not a toxic drug. There have been absolutely no documented deaths from LSD overdose; the closest we’ve come was a group of partiers who snorted pure LSD crystal by accident, ingesting thousands of times a normal dose. They suffered some nasty physical effects including diarrhea and seizures, but they all survived. They didn’t even suffer any major psychological difficulties in the years following the event.

The psychological dangers of LSD are another story. Although we’ve moved past the proved-to-be-false scare stories of kids being blinded by the sun or jumping out of windows, psychedelics really do dramatically alter your perception of reality, and can certainly do some harm to your mind if used irresponsibly.
It’s these psychological harms that have been investigated in a recent study looking back at the hundreds of people who were given LSD in hospitals in the 60s and 70s in Denmark.
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