"LSD made in CSSR" (2015,CZ) - documentary by Pavel Křemen and Czech Television, describes those times very interestingly
https://www.ceskatelevize.cz/porady/10463665003-lsd-made-in-...
https://www.ceskatelevize.cz/porady/10463665003-lsd-made-in-...
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.theguardian.com/science/2004/feb/26/research.sci...