[vidarh]

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).

[Neekerer]

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.