rgic reactions or stomach a intestine problems, such as bleeding and cers, which can occur without warning and may cause death. patients also taking aspirin and the eldey are at incrsed risk for stoch bleeding and ulcers. do not take celebrex if you have had an asthma attack, hives, or other allergies to aspirin, nsaids or sulfonamides. get help rightway if you have swelng of the face or throat, or