Levitra

Viagra sales declined 2 percent to $1.6 billion in 2005, said Pfizer in its earnings report on Thursday.

Viagra sales dropped 8 percent in the fourth quarter to $430 million.

Pfizer attributed the sales decline to "slower growth in the overall erectile-dysfunction market and competition from other products." Full year sales figures for Competition heating up in 2006 Prior to today's report, Al Rauch, analyst for A.G.

Edwards & Sons, projected that Cialis sales would reach $900 million in 2006.

Many analyst believe that the market for sexual dysfunction drugs has reached capacity, meaning more intensified competition between drug makers as they battle for market share.

Lilly spokesman Phil Belt said the sales growth for Cialis was "built largely on market share gain" and Lilly is marketing its product as significantly different from its competitors.

Belt said that Cialis has a "convenient" 36-hour window for men suffering from impotence, allowing them to achieve erection during that time if stimulated.

Pfizer is also trying to expand market share with a recently launched education campaign about erectile dysfunction that does not spec...

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