These new studies suggest that these common drugs could have significant downsides. Scientists say they appear to be associated with a modest upsurge in bone fractures in postmenopausal women.
And a significant increase in bacterial infections among hospitalized patients.
Scientists are also questioning the benefits saying they don't seem to do a better job than older medications at keeping patients from having more bleeding, needing surgery or staying alive. They suggest doctors weigh both the benefits and the risks before prescribing them.
