Other than being a psychedelic, LSD is a stimulant and vasoconstrictor, so while physically unsafe doses are quite high (yes I've read about 'thumb print' doses), it's probably not wise to say that there is no unsafe dose of LSD.
It is unlikely you'll ever come across that much LSD, but LD50 is estimated at about 100mg, which is about 500-1000 ordinary doses.
And the dude that discovered LSD took it in the order of miligrams and recovered fine.
What I'm saying is that it's not the same as insuline for instance. If anyone takes too much insuline it'll kill him, universally. It's not the same with LSD.
If LSD is dangerous then it's situational which sets it apart from other drugs.
I know a guy who had something of an LSD overdose. Went psychotic and fully changed his personality. Total space cadet after. Ended up attacking an old man in a parking lot that he thought was a demon some months later.
Other than being a psychedelic, LSD is a stimulant and vasoconstrictor, so while physically unsafe doses are quite high (yes I've read about 'thumb print' doses), it's probably not wise to say that there is no unsafe dose of LSD.
It is unlikely you'll ever come across that much LSD, but LD50 is estimated at about 100mg, which is about 500-1000 ordinary doses.