LSD isn’t a dangerous drug, short or long term. There’s a lot of hype from the drug warriors on it, but it is 100% lies. It’s not even possible to OD on it, that’s how not dangerous it is.
http://www.newsobserver.com/2012/10/17/2415715/apex-student-dies-after-apparent.html
However - I can’t help but wonder if this Apex NC death - attributed up till now to LSD - could be this N-Bomb drug?
Either way - the point is you take street drugs made by who knows who of who knows what composition and who knows what potency - bad things can happen.
And of course in this modern world where we deliberately dope up our kids you have to worry about drug interactions. Grapefruit juice is perfectly harmless too, until you’re on lipitor (which I personally find annoying since I love grapefruits). And as you point out, if you’re buying stuff off the street who knows for sure. Robert Anton Wilson always used to call street LSD “sold as”, apparently for a while it was popular to substitute speed.