Public domain "acetylsalicylic acid" (2-acetoxybenzoic acid) is better known as "aspirin" in the United States—a generic term. In Canada, however, "Aspirin", with an uppercase A, is still a trademark of the German company Bayer, while aspirin, with a lowercase "a", is not. Bayer lost the trademark in the United States, the UK and France after World War I, as part of the Treaty of Versailles. So many copycat products entered the marketplace during the war that it was deemed generic just three years later. Bayer also lost the trademark in the same jurisdictions for "Heroin" which it trademarked a year before it
U Should've Known Better producers, which included Dallas Austin, production team Soulshock & Karlin, Bryan Michael Cox, and Rodney Jerkins and his Darkchild crew. Though she "had never thought about writing much" by then, her producers encouraged the singer to intensify her work on the "All Eyez on Me" album and to write and contribute own lyrics and ideas to the songs, one of which was the ballad "U Should've Known Better." Monica penned the song along with Harold Lilly and longtime contributor Jermaine Dupri, while production on the track was helmed by Dupri and Bryan Michael Cox. "U Should've Known Better" was mixed