Merck withholds forecasts after cholesterol study

By Lewis Krauskopf and Ransdell Pierson

NEW YORK (Reuters) - Merck & Co Inc cut its sales outlook on two key medicines on Monday and indicated its financial forecasts were in doubt after a mostly negative study of cholesterol treatment Vytorin, sending its shares down 7 percent.

It was the second dose of bad news on Monday for the drugmaker. Merck shares dropped 6.2 percent in regular trading after the study on Vytorin, sold with Schering-Plough Corp, showed it failed to prevent further damage to patients with impaired heart valves.

Merck's dour outlook overshadowed better-than-expected second-quarter results from the company.

"The initial thoughts on Merck not reiterating their long- term guidance and lowering their revenue guidance on Gardasil and Singulair is going to raise a lot of questions about the company's results," Leerink Swann analyst Seamus Fernandez said.

Merck projected 2008 sales of between $1.4 billion and $1.6 billion for Gardasil, which prevents infection with the sexually transmitted virus that causes cervical cancer in girls and women. That is down from its prior view of $1.9 billion to $2.1 billion.

The lowered forecast was due in part to the company's failure earlier this year to win U.S. approval to market the vaccine to an older group of women.

Gardasil sales have been under pressure because of slowing use among girls 13-18 years old and difficulties motivating vaccination among 19-26-year olds, Merck said.

The company now expects revenue for Singulair, which treats asthma and allergy, of $4.4 billion to $4.6 billion, compared with $4.6 billion to $4.8 billion previously. Demand for the pill has been hurt by recent warnings it can increase the risk of suicidal thoughts. For the quarter, Singulair sales fell 1 percent to $1.1 billion.