Lipitor, launched in 1997, has fetched $10 billion in annual revenues to the company since then. The equation, however, would soon change when generic-drug makers begin selling cheaper versions. Plus, Pfizer's patent for Xalatan glaucoma drug also expires in 2011. So what's a huge pharma company to do?
The other victims
Fortunately, Pfizer is not alone in battling patent troubles. Other big pharmaceutical firms are also facing a similar challenge.
For these drugmakers that have relied heavily on their patented offerings to generate revenue, the next few years appear unusually daunting. One estimate suggests a total of more than 10 medicines would start facing generic competition from this year, resulting in a loss of nearly $50 billion in terms of annual sales of all these medicines put together.
Patent expiration woes
Patent expirations present a great deal of difficulty to pharmaceutical companies -- the companies no longer have the "safety" of their patented drugs, and they need to create new products to be in the race. However, hundreds of millions of dollars in research and development expenses do not necessarily guarantee approval -- but do drain the company's finances.
For example, the industry essentially doubled annual R&D spending over the past decade to a whopping $45 billion, yet Food and Drug Administration approvals are increasingly tough to come by. In 2010, Pfizer and Eli Lilly had high-profile failures with drugs attempting to treat Alzheimer's disease. Earlier this year, Merck was also unsuccessful with anti-clotting medicine vorapaxar, one of the key justifications for the Schering-Plough merger.
The smaller effects
Patent expirations, however, are a boon to small generic companies and customers of generics who enjoy a much cheaper price tag of highly desired medicines. Generic-drug makers get a readymade base for building their products with just a small amount of investment in research and development. Plus consumers stand to gain from cheaper versions of the medicines they have been taking. Nevertheless, apprehensions remain that the generics may not be equally efficient as their original versions.
The brighter side
I'm not trying to sound too pessimistic about the coming wave of patent expirations and its effect on big drug companies. Every ending signifies a new beginning, and a continued use of existing products reduces the scope of innovation. So if patents on old drugs cease to exist, it may pave the way for new ones. Patent expiration ensures that companies indulge in continuous research. And constant effort may actually improve the quality of research leading to the invention of new technologies and new products. These new products not only create a wider product line but could also be more profitable.