Xanax (alprazolam) isn't calming me down. feels like my heart is racing but isnt. a little bit of tingling in my right arm. chest pressure?

Panic attack?: You most likely are experiencing a panic attack, your tingling is due to hyperventilation 2/2 Anxiety. I'm wondering how often this happens, you might benefit from SSRI treatment. Please see your Psychiatrist.

Panic / anxiety: Xanax (alprazolam) is too short acting in my opinion to be used for anxiety disorder. As a behavioral neurologist I see a lot of people with head injury, dementia, mood disorders, epilepsy and anxiety disorders. Rebreathing carbon dioxide using a small paper bag helps many people with panic attacks / hyperventilation. Long term therapy includes CBT, clean meds, simplification of meds, etc.