How far back? Like, back when Coca Cola had the extract of coca leaves?
Or, back when the company claimed that lithium was an ingredient?
wiki:
The drink did, initially, claim to contain lithium citrate, a mood-stabilizing drug.[1]: §2 It was one of a number of patent medicine products popular in the late-19th and early-20th centuries.[8] In 1936 the federal government forced the manufacturer to remove a number of health claims, and because “lithium was not an actual ingredient”, the name was changed to just “7 Up” in 1937.[1]: §2