The Food and Drug Administration has approved Alprazolam 0.5mg for anxiety and panic disorders. There are two variants of this drug Immediate-release (IR) and Extended-release (ER) oral tablets. Alprazolam 0.5 mg (R 029 pill) is an active ingredient in various branded drugs like Xanax XR, Xanax, Niravam, etc. 029 orange pill is a prescription drug only which is a controlled substance of Schedule I