To: aknahow who wrote (1028 ) 11/11/1998 6:46:00 PM From: Anthony Wong Respond to of 1722
Pfizer says Norvasc cuts cardiovascular events Wednesday November 11, 12:09 pm Eastern Time By Ransdell Pierson DALLAS, Nov 11 (Reuters) - Pfizer Inc. (NYSE:PFE - news) said Wednesday that patients taking its flagship hypertension and angina drug Norvasc had 31 percent fewer cardiovascular events than patients taking a placebo. Pfizer was to formerly present data from its 825-patient trial of coronary artery disease patients later Wednesday at the annual American Heart Association scientific sessions being held here. Dr. Rob Scott, Pfizer's cardiovascular medical director, said the events that were apparently reduced by Norvasc, a calcium channel blocker, included heart attack, stroke, death, angioplasty, bypass surgery, hospitalizations for severe angina and heart failure. He said patients taking Norvasc (amlodipine) required 46 percent fewer angioplasty and bypass procedures, and had 35 percent fewer hospitalizations for severe chest pain. In angioplasties, surgeons open up clogged arteries by threading through them a catheter tipped with an inflated balloon. Bypass surgery involves the grafting of an artery from elsewhere in the body into the heart to restore blocked blood flow to the pumping organ. Scott told Reuters the study was the first to show such impressive preventive benefits for any calcium channel blocker. Previous trials of other channel blockers by other companies showed dismal results that had blackened the reputation of the class of drugs, he said. Scott and other researchers, however, said that both placebo patients and patients taking Norvasc in the Pfizer trial showed no real difference in the progression of their atherosclerosis, or clogging of the arteries. But the amount of plaque buildup in the carotid artery, which supplies blood from the neck to the brain, was significantly lower in the Norvasc group, he said. ''That is important because as you get increased plaque in the carotid artery, you have an increased danger of stroke,'' he said. The lesser clogging of the carotid artery in the Norvasc group was among the most important findings in the three-year study. Norvasc is currently approved for hypertension and angina but not for prevention of stroke, Scott said. About 14 million Americans have coronary artery disease, which Pfizer said causes 500,000 deaths a year and is the leading cause of death in the United States. Sales of Norvasc in 1997 totaled $2.2 billion, about triple the expected 1998 sales of Pfizer's blockbuster impotence drug Viagra. Pfizer said the Norvasc study, which began in 1992, took two years to recruit patients, who were then tracked for three years. ''Of all the calcium channel blockers, Norvasc has the longest duration of action,'' Scott said, an aspect that he said might help account for its better performance in preventing incidents than previously-tested channel blockers. Older drugs in the class include Procardia-XL, another Pfizer drug, and generic drugs such as Nicardipine, Scott said. biz.yahoo.com