(FILES) This 07 February 2000 file image

(FILES) This 07 February 2000 file image shows pharmaceutical giant Pfizer’s New York headquarters. US health officials 07 April, 2005 asked Pfizer to withdraw the arthritis drug Bextra from the market due to potential health risks, and ordered new warning labels for others in a similar class of drugs, including Pfizer’s Celebrex. The Food and Drug Administration announced the changes on rules for the so-called COX-2 medications used for pain and arthritis, requiring warnings for a risk of heart problems and gastrointestinal bleeding. Additional warning labels will be required for other painkilling medications sold by prescription or over the counter warning of potential risks, the FDA said in a statement. Pfizer said in a statement it would work with the FDA on new warning labels for Celebrex. AFP PHOTO/FILES/Henny Ray ABRAMS (Photo credit should read HENNY RAY ABRAMS/AFP/Getty Images)