The FDA allowed Merck to claim that Vioxx was gentler on the stomach than naproxen, but many patients might be surprised to learn that Pfizer has never conclusively demonstrated the gastrointestinal superiority of Celebrex. For Susan Ferris, the drug Celebrex has been "a godsend." The 48-year-old South Florida woman has been taking it for her arthritis pain since 2001. She can't tolerate older remedies, such as aspirin or ibuprofen. Since Friday's announcement that Celebrex might be linked to heart attacks and strokes, though, she's not sure what to think. On top of that, she worries about her 58-year-old husband, who...