Excedrin is an over-the-counter headache pain reliever, typically in the form of tablets or caplets. It contains acetaminophen, acetylsalicylic acid, and caffeine. Until late 2005 it was manufactured by Bristol-Myers Squibb, but in July 2005 it was purchased by (and is now produced by) Novartis, along with other products from BMS's over-the-counter business.