You could get a headache trying to name all of Bayer's products. The company, which created aspirin in 1897, makes prescription products and works in oncology and radiology through its Pharmaceuticals division; OTC products like Claritin and Canesten via its Consumer Health division; and crop protection and pest control via its Crop Science division. Its top selling pharmaceuticals include oral anticoagulent Xarelto and blood-clotting medicine Kogenate. Bayer also operates an animal health business unit; its top-seller is Advantage, a flea medicine. Also known as Bayer Group, the firm has some 300 operating subsidiaries worldwide; it operates in the US through Bayer Corporation. The company spun off its material science division in 2015, but retains 69% ownership.