The solution of the ergotoxine problem had led to fruitful results, described here only
briefly, and had opened up further avenues of research. And yet I could not forget the
relatively uninteresting LSD-25. A peculiar presentiment—the feeling that this substance
could possess properties other than those established in the first investigations—induced
me, five years after the first synthesis, to produce LSD-25 once again so that a sample
could be given to the pharmacological department for further tests. This was quite
unusual; experimental substances, as a rule, were definitely stricken from the research
program if once found to be lacking in pharmacological interest.
Nevertheless, in the spring of 1943, I repeated the synthesis of LSD-25. As in the first
synthesis, this involved the production of only a few centigrams of the compound.
In the final step of the synthesis, during the purification and crystallization of lysergic
acid diethylamide in the form of a tartrate (tartaric acid salt), I was interrupted in my
work by unusual sensations. The following description of this incident comes from the
report that I sent at the time to Professor Stoll:
Last Friday, April 16,1943, I was forced to interrupt my work in the laboratory in the
middle of the afternoon and proceed home, being affected by a remarkable restlessness,
combined with a slight dizziness. At home I lay down and sank into a not unpleasant
intoxicated-like condition, characterized by an extremely stimulated imagination. In a
dreamlike state, with eyes closed (I found the daylight to be unpleasantly glaring), I
perceived an uninterrupted stream of fantastic pictures, extraordinary shapes with intense,
kaleidoscopic play of colors. After some two hours this condition faded away.
This was, altogether, a remarkable experience—both in its sudden onset and its
extraordinary course. It seemed to have resulted from some external toxic influence; I
surmised a connection with the substance I had been working with at the time, lysergic
acid diethylamide tartrate. But this led to another question: how had I managed to absorb
this material? Because of the known toxicity of ergot substances, I always maintained
meticulously neat work habits. Possibly a bit of the LSD solution had contacted my
fingertips during crystallization, and a trace of the substance was absorbed through the
skin. If LSD-25 had indeed been the cause of this bizarre experience, then it must be a
substance of extraordinary potency. There seemed to be only one way of getting to the
bottom of this. I decided on a self-experiment.
Exercising extreme caution, I began the planned series of experiments with the
smallest quantity that could be expected to produce some effect, considering the activity
of the ergot alkaloids known at the time: namely, 0.25 mg (mg = milligram = one
thousandth of a gram) of lysergic acid diethylamide tartrate. Quoted below is the entry
for this experiment in my laboratory journal of April 19, 1943.
LSD My Problem Child,Chapter1