Patients with coronary heart disease who took Pfizer's cholesterol-lowering medicine Lipitor (atorvastatin calcium) and lowered their cholesterol to well below recommended levels experienced significantly fewer heart attacks and strokes than those who only lowered their cholesterol to recommended levels, according to data presented here today at the annual meeting of the American College of Cardiology.
The five-year Treating to New Targets Trial (TNT) involved 10,000 patients with established coronary heart disease and elevated LDL, or "bad" cholesterol levels. The study assessed whether high-dose Lipitor patients who aggressively lowered their LDL-cholesterol levels to well below the current guidelines (100 mg/dL) would experience additional cardiovascular benefits compared to Lipitor patients who maintained their LDL-cholesterol at recommended levels.
Patients who received 80 mg doses of Lipitor had 22 percent fewer cardiovascular events, including CHD death, non-fatal heart attacks, resuscitated cardiac arrest, and fatal or non-fatal strokes compared to patients who took 10 mg of Lipitor. In addition, patients treated with high- dose Lipitor had 25 percent fewer fatal or non-fatal strokes compared to those treated with just 10 mg of Lipitor.
The TNT study demonstrated that the musculoskeletal safety profile of Lipitor at 80 mg dosing was comparable to Lipitor 10 mg doses. The incidence of liver enzyme elevations in both groups was within existing product labeling. TNT is the longest and largest study to date of Lipitor 80 mg efficacy and safety.
"Previous clinical trials including, ASCOT and CARDS, have shown the outstanding ability of Lipitor 10 mg to safely get patients to their goal levels and reduce their risk of cardiovascular events," said Dr. Joseph Feczko, Pfizer's chief medical officer. "TNT is the very first study to demonstrate even greater cardiovascular benefits of lowering LDL beyond recommended guidelines with Lipitor 80 mg. Patients achieved these results safely, and Lipitor 80 mg was well tolerated."
According to the March 8 online issue of the New England Journal of Medicine, TNT investigators concluded that "intensive lipid-lowering therapy with 80 mg of atorvastatin per day in patients with stable CHD provides significant clinical benefit beyond therapy with 10 mg of atorvastatin per day."