WHY was the 7-up drink originally filled with lithium citrate and used as a cure for depression and hangovers?

7-up was invented by Charles Leiper Grigg in 1920. He came up with the idea of adding lithium citrate to the drink, one of the drugs now prescribed for manic-depressive psychosis. Lithium citrate also helped relieve hangover syndrome.

7-up immediately became popular during the Great Depression and was called lithium-lemon soda at the time. The name was soon changed, but lithium was part of the drink until the 1950s, with 7-up officially considered a patented medicine. Various versions of the origin of the drink’s name exist. Some claim that the original recipe had 7 components, while others recall the atomic mass of lithium, which is seven.

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