Background

Developed first as a treatment for hypertension angina and chest pains caused by poor blood circulation, the chemists at Pfizer quickly realized in testing that it had little effect treating these symptoms---but had tremendous effects on penile erections.

History

Patented in 1996, Pfizer introduced Viagra as a treatment for erectile dysfunction after approval by the U.S. Food and Drug Administration in March 1998. From 1999 through 2001, Viagra recorded over $1 billion in capsule sales, according to ILoveIndia.com.

Additional Findings

Additional testing, inspired by Viagra's original intent, has shown positive results treating such diverse conditions as jet lag, premature ejaculation, strokes, underweight intrauterine babies, multiple sclerosis, heart failure, diabetes---and wilting flowers, according to The Independent.

Present

Viagra competes with several rival brands for the 92 percent market share it controlled in 2000, reports ILoveIndia.com, which notes that Cialis and Levitra are Viagra's main competitors, though counterfeits eroded its stranglehold on the penile dysfunction market by 2007.

Future

Pfizer's worldwide patents on Viagra expire between 2011 and 2013. Available as a limited-quantity over-the-counter medication in England since 2007, such sales could boost the company's profits if widespread.

Source:

ILoveIndia.com: History of Viagra

The Independent: Happy Birthday Viagra

More Information:

Viagra.com