keywords: celebrex vioxx pfizer risks risk
text: Pfizer's Celebrex Lifts Heart Attack Risk in Trial (Reuters) Reuters - Pfizer Inc. on Friday said its popular\Celebrex arthritis drug more than doubled the risk of heart\attack in a large cancer-prevention trial, a setback that comes\just weeks after Merck   Co. recalled its similar Vioxx drug\due to heart safety risks.