When was adderall invented?

Adderall was first formulated and brought to market in the United States in 1971 by Schering (now part of Pfizer). It is a specific blend of four amphetamine salts—dextroamphetamine saccharate, dextroamphetamine sulfate, amphetamine aspartate, and amphetamine sulfate—designed to produce a balanced, sustained stimulant effect.

(While the basic compound amphetamine was first synthesized in 1887, the particular combination that we now call Adderall was not created until the early 1970s.)