Recent animal studies have linked the two medications to a possible increased risk for cancer.
The manufacturers say they will perform research studies to see if there is a risk in humans and, if so, what it is.
Black box warnings have recently gotten a lot of attention with the arthritis drugs such as Celebrex and Bextra. But pharmacists say they are nothing new and they should not be a cause for alarm.
The warnings are on many drugs and it does not mean the drugs are not good or that they are dangerous; It just means there may be greater risks with use of the medications for certain classes of people.