It can be changed when we're willing to change it. Depends on the medications. I recommend that people taper off benzodiazapine medications when they start breathing practice. It might take awhile, but it is awful hard to recover when you are taking the benzo's. The anxiety medications prevent you from learning and remembering.
Some people get panic attacks when having to make phone calls.
Well this is a breathing thing again. First you learn to change your breathing, then you practice on the phone with a friend who can remind you to breathe right as you talk. All my anxiety and panic disappeared when I truly went thru the pause and went off of the medications. My dizzy spells have been diagnosed as migraines from stress and anxiety. Started to have panic attacks and was put on medication.