Erectile dysfunction (ED) drug Viagra had global sales of $747 million in 2005, a 35 percent increase over 2004

In December, Viagra, held a quarter of the U.S. market, up 5 percentage points from a year earlier. And costs for selling and marketing continued to decline.

These factors contributed to a $5.6 million fourth-quarter profit, the first in the Bothell company's 15-year history. But earnings of 9 cents a share, triple analysts' expectations, didn't distract investors from the company's forecast that Cialis sales in 2006 will reach $860 million to $900 million, a growth rate of 15 to 20 percent. The drug is sold through a joint venture with Eli Lilly.

ED drug Viagra, is approved by FDA for the treatment of erectile dysfunction or impotence.

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