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That doesn’t seem possible. I’m not aware of a single documented case of an actual LSD overdose (in the fatal sense)

The most famous example of how hard it is to overdose on LSD was probably the case where 8 patients were admitted after snorting what they thought was cocaine, but which turned out to be LSD.

The amounts in their blood suggests they each got hundreds of times a normal dose. All eight survived (though it's not clear if they would have without hospital treatment).

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1129381/ here's a research paper on them. They were in really rough shape for a hit but did survive. It's a fascinating read.

The only example I can think of is Tusko, the elephant who was experimented on.

https://www.theguardian.com/science/2004/feb/26/research.sci...

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