McNeil Laboratories coined Tylenol in 1955 by clipping the chemical name N-acetyl-para-aminophenol: TYL plus ENOL. The generic names do the same trick: aceta-minophen and para-cetamol are both compressed from the same molecule. Three names, one equation. The molecule itself was synthesized in 1878 by Harmon Northrop Morse, shelved for fifty years after being blamed for a blood disorder actually caused by a related drug, and rehabilitated by Brodie and Axelrod in 1948.
Dig one root deeper and the name lights up. The ENOL in Tylenol is phenol, and phenol comes from Greek phainein, to shine, to appear. The first benzene compounds were distilled from coal tar, the black sludge left over when cities cooked coal into illuminating gas for street lamps, so chemists named the family after light: the shiners. Runge isolated it from the tar in 1834, Gerhardt gave it the glowing name in 1842, and Lister turned it into carbolic acid, the antiseptic that made modern surgery survivable. Lamp soot, to a word meaning light, to the white pill in your cabinet.
Here is the provocative part. Phainein is also the root of Phanes, the Orphic first god, the shining one who hatched from the cosmic egg and revealed the world. Your most anonymous white pill carries the name of a god of appearance. And after more than seventy years and billions of doses, science still cannot fully explain how acetaminophen works; every proposed mechanism has failed scrutiny. The drug named for light keeps its action in the dark.
Drug names are chemistry compressed into marketing. If you read the label as an equation, what else on your shelf is a formula in disguise?