Bayer is a multinational pharmaceutical and life sciences company that develops and produces a wide range of products, including prescription drugs, over-the-counter medications, and agricultural chemicals. The company was founded in 1863 and is headquartered in Leverkusen, Germany. Bayer operates in three main business segments: Pharmaceuticals, Consumer Health, and Crop Science. The company is known for products such as Aspirin, Aleve, and Claritin, among others.