High Quality Content by WIKIPEDIA articles! Pfizer Incorporatedis a pharmaceutical company, ranking number one in sales in the world. The company is based in New York City, with its research headquarters in Groton, Connecticut. It produces Lipitor (atorvastatin, used to lower blood cholesterol); the neuropathic pain/fibromyalgia drug Lyrica (pregabalin); the oral antifungal medication Diflucan (fluconazole), the antibiotic Zithromax (azithromycin), Viagra (sildenafil) for erectile dysfunction, and the anti-inflammatory Celebrex (celecoxib) (also known as Celebra in some countries outside the USA and Canada, mainly in South America).