Initially LSD was created to be used as blood stimulant.

A Swiss chemist Albert Hofmann on 16th of April in the year 1943, accidentally ingested LSD, a drug that he created with an intention to use as a blood stimulant. Later he noted that the drug sent him into an intoxicated-like condition characterized by an extremely stimulated imagination. US banned LSD in 1960-70’s after it was known to be used as a recreational drug.