These anti-inflammatories all seem to have bad side effects and are probably best avoided, or at least taken minimally.
Any one taking them is part of the drug trial, as they haven't been out long enough to have been properly tested over time.
Would you trust a drug company with your health in this case???
Your friend may have a drug sensitivity, so any new one should be taken at a very small dose for a while-say 1/4 tablet only.
You are right to be concerned-all drugs have as much potential to harm as to help, and you never really know which one you will receive.