
Having the gene variants seems to reduce the effectiveness of Plavix and put patients at higher risk of developing blood clots in the stent, suffering a heart attack or stroke, or even dying, according to the research.
"Clopidogrel is one of the most commonly prescribed medications worldwide," said lead researcher Dr. Jessica L. Mega, an instructor in medicine at Brigham and Women's Hospital and Harvard Medical School in Boston.
Source: http://www.nlm.nih.gov/medlineplus/news/fullstory_104812.html