Pfizer Incorporated having based in New York City of the United States is recognized as the biggest explore oriented pharmaceutical company in the world. The company is the manufacturer of the apex selling medications such as Lipitor formulated using the active pharmaceutical ingredient-API Atorvastatin effectively used to lower blood cholesterols, the anti-fungal oral drug known as Diflucan made by using API Fluconazole, the prolonged active antibiotic called Zithromax duly made from Azithromycin API, the most popular erectile dysfunction medication Viagra formulated form Sildenafil Citrate and the anti-inflammatory drug Celebrex or Celebra as it is known in some countries outside USA and Canada or South America made from Celecoxib API.     

Pfizer has been named after German-American cousins Charles Pfizer and Charles Erhardt who jointly established the chemical business named as Charles Pfizer & Company based at the building located at the junction of Harrison Avenue and Bartlett Street in Williamsburg, Brooklyn during the year 1849. They manufactured the anti-parasitic branded as Santonin. However, Pfizer development and success got its thrust through Citric Acids during 1880s. Pfizer maintained its property acquiring spree for expanding their laboratory and manufacturing unit within the same vicinity. Pfizer founded its primary administrative headquarters at 81, Maiden Lane in Manhattan, USA.