LSD has a Nazi past nobody thinks about: Sandoz shipped its precursor to Hitler's chief biochemist in 1943, and it was probably used in Dachau.

And then I found a smoking gun: October 1943. Kuhn acknowledges that he receives half a gram of ergotamine, which is the precursor drug to LSD. And so it's highly likely that the Nazis used LSD together with mescaline in Dachau.