Which drug was an ingredient in 7 Up until 1948?

Lithium citrate (Li3C6H5O7) is a lithium salt of citric acid that is used as a mood stabilizer in psychiatric treatment of manic states and bipolar disorder. There is extensive pharmacology of lithium, the active component of this salt.

An early version of Coca-Cola available in pharmacies' soda fountains called Lithia Coke was a mixture of Coca-Cola syrup and lithia water. The soft drink 7Up was originally named "Bib-Label Lithiated Lemon-Lime Soda" when it was formulated in 1929 because it contained lithium citrate. The beverage was a patent medicine marketed as a cure for hangover. Lithium citrate was removed from 7Up in 1948 after it was banned by the Food and Drug Administration.

Lithium citrate is used as a mood stabilizer and is used to treat mania, hypomania, depression and bipolar disorder. It can be administered orally in the form of a syrup.