Pfizer (NYSE: PFE) is a developer and marketer of prescription drugs. It was founded in 1849 and its headquarters are in New York, NY.
A large pharmaceutical company selling prescription drugs worldwide. Famous for Lipitor and Viagra among many other drugs. A steady payer of dividends for over 25 years.
A steady performer, but, like many pharmaceutical companies, Pfizer is facing patent expiration on many of its drugs. Lipitor, the company's biggest selling drug, loses patent protection in 2010. As generics come on line, investors should expect sales to fall off drastically. This happened with Zoloft in 2007.
Over 90% of its 2007 revenue ($48.4 billion) came from pharmaceuticals, with the remainder from its animal health division. In 2006, Pfizer sold its consumer products division to Johnson and Johnson, which included such brands as Listerine and Sudafed.
The company recently announced a refocusing to cancer and biotechnology drugs and away from heart disease. This may be in preparation to the upcoming loss of patent of Lipitor.
Book: “The Legend of Pfizer,” by Jeffrey L. Rodengren, Write Stuff Syndicate Inc., 1999. See the review posted on Motley Fool's Books--Non-fiction discussion board: 
Here are several of the prescription drugs currently sold by Pfizer:
- Celebrex -- arthritis joint pain
- Chantix -- smoking cessation
- Geodon -- schizophrenia
- Lipitor -- a statin which reduces levels of "bad" cholesterol, LDL. In 2007, this one drug alone accounted for 25% of the company's revenue.
- Lyrica -- epilepsy
- Norvasc -- high blood pressure.
- Viagra -- erectile dysfunction
- Zoloft -- depression
- Zyrtec -- allergies and hayfever