The generic term used in the United States is Acetaminophen. Europeans don't know what that is, Americans don't know what Paracetamol is, they're the same thing. Generics are available but brand name Tylenol is ubiquitous here.

Tylenol is a brand that is old enough to be from a time before trademark law had been abused to death, back when a brand name meant you know who makes this. That idea is even more fundamental to American culture than freedom of speech but it got smothered in bed first.