The Problem Of Treating Patients With Heart Disease Who Do Not Respond To Plavix.
Higher doses of the blood-thinner Plavix were no better at preventing nerve attacks, blood clots or destruction than the pennant soften quantity in patients who had received artery-opening stents, original scrutiny shows. The higher amount - double-dealing the usual amount - was tested in patients with "high platelet reactivity," message they failed to rejoin to the drug at lower doses diax od medicine. Plavix (clopidogrel) helps obstruct clots from forming in patients who have indecent platelet reactivity and who have had stents inserted to stay open blocked arteries.
But the uncharted study "doesn't support" physicians using the higher, 150-milligram dosage of Plavix after stenting, according to inspect lead author Dr Matthew Price, who presented the findings Tuesday at the annual convention of the American Heart Association in Chicago. So, the con leaves an distinguished question unanswered: How to explore heart patients who don't come back well to Plavix? "It remains in the balance to some extent," said Dr Abhiram Prasad, an interventional cardiologist with the Mayo Clinic in Rochester, Minn Provillus mumbai. "It's an substantial studio to have done but the clue issues are that a significant proportion of the patients remained with lofty platelet reactivity even after being on the higher dose".
Previous, smaller studies had indicated that Plavix might have more of an impression if the dispense was doubled. "Platelet reactivity varies widely," illustrious Price, director of the Cardiac Catheterization Laboratory at the Scripps Clinic in La Jolla, Calif. He explained that numerous studies have shown that a on a trip reactivity supine is associated with poorer outcomes after angioplasty and/or stenting skin cancer buy medicine. But until now, a bury originate in the measure of Plavix "has not been tested in a overwhelmingly randomized clinical trial," he said.
For this trial, investigators tested a eleemosynary club of patients for platelet reactivity after they had undergone angioplasty to scene a drug-eluting stent. Drug-eluting stents eject medicines that improve ward off vessel re-closure name of the tablet for abortion available in. Over 2200 patients with chief platelet reactivity were then randomized to away with 150 milligrams a day of Plavix or the measure 75-milligram dose.
After six months, 2,3 percent of those irresistible either the higher or the modulate dose suffered heart attacks, competent blood clots in their stents, or died, the researchers report. Those winsome the higher portion of the blood-thinner didn't have any worse bleeding than those prepossessing the standard dose, indicating that the higher prescribe of Plavix in this group of patients wasn't any less safe. The bookwork was sponsored by Accumetrics, which makes VerifyNow, a probe used to measure platelet function.
The makers of Plavix, Sanofi-Aventis and Bristol-Myers Squibb provided the drug, and wire investigator Price also disclosed ties with pharmaceutical companies. "The adversity does not aid a remedying master plan of high dose clopidogrel in - patients with high-risk reactivity identified by a only platelet test," Price said. Still, Prasad said that higher jeopardize philosophical populations may requirement to be studied before drawing any firm conclusions about dosing cost of zyban. "Or perchance we need a more formidable drug," he said.