Pfizer, Inc. is a research-based, global pharmaceutical company. The Company discovers, develops, manufactures and markets medicines for humans and animals. Pfizer operates in two business segments, pharmaceutical, which includes prescription pharmaceuticals for treating cardiovascular diseases, infectious diseases, central nervous system disorders, diabetes, erectile dysfunction, allergies, arthritis and other disorders, as well as non-prescription self-medications, and animal health, which includes anti-parasitic, anti-infective and anti-inflammatory medicines and vaccines for livestock, poultry and companion animals. The Company's prescription medication product brands include Norvasc, Cardura, Zithromax, Difulcan, Zoloft, Viagra, Zyrtek, Procardia XL and Glucotrol XL. Some of the Company's non-prescription medication brands include Visine, BenGay, Cortizone, Rid, Desitin, Unisom, Plax and Barbasol. Some animal health products include Revolution, Rimadyl, Vanguard and Anipryl.