Bayer is a multinational pharmaceutical and life sciences company based in Germany. The company was founded in 1863 and has its headquarters in Leverkusen. Bayer operates in various sectors, including pharmaceuticals, consumer health, agriculture, and animal health.

Bayer's pharmaceutical division develops and markets prescription medications across a wide range of therapeutic areas. They focus on areas such as cardiovascular health, oncology, women's health, ophthalmology, hematology, and radiology. Notable prescription drugs from Bayer include Xarelto (rivaroxaban), a blood thinner; Nexavar (sorafenib), a cancer medication; and Yasmin (drospirenone/ethinyl estradiol), a birth control pill.

In the consumer health sector, Bayer produces and markets over-the-counter (OTC) medications, nutritional supplements, and personal care products. Some well-known brands under Bayer's consumer health division include Aspirin, Aleve, Claritin, Coppertone, and One A Day.

Bayer also has a significant presence in the agricultural sector through its Crop Science division. They develop and sell crop protection products, seeds, and traits to help farmers improve crop yield and manage pests and diseases. Bayer's agricultural products include herbicides, insecticides, fungicides, and genetically modified seeds.