You can measure anything in nanograms, but a typical LSD dose starts at about 100ug with the threshold at about 25ug or so. Still not much, but not what you’d usually measure in nanograms.
That’s ten million doses to the kilo though. I have no idea what the current cost of LSD is, it used to be 5 euros when I bought it last (dating myself here), so 100 million bucks to smack someone KO as a conservative guess…