Hi Froggy,
this is the other area I work alot in(as well as fetility, pregnancy )I would work the whole, paying particular attention to the solar plexus, relaxation, pineal, pituatry, adrenals and kidney reflexes.The beta blockers as you probably know slow the heart beat....it tends to be the automatic response allopathically along with AD'S with sedative effect []......visualisations can be helpful if she has a panic attack whilst with you, such as imaginning a huge tap, turning it on full and allowing it to run until it runs clear or a comforting colour, also grounding crystals such as smokey quartz can be helpful held in each hand....its not unusual for a real energy shift to take place during or after the first treatment so I'd gently advise her of this. Flower remedies are great too to help. Beta blockers have an effect of making the person distant and spacey, so you may find this in the way the feet present, toes are generally cold....detatchment from emotions!
I've found a combination of Reflex with either hypnotherapy and or Homeopathy to be excellent!
Hope that helps,
Lisa x