There are also some alternative options that may help ... the link below is the international site for Tellington Touch - it is something I have only recently come across (although it has been around for 20+ years) and looks kinda cool - http://www.tellingtontouch.com/ttouch.htm where you may find some relaxation methods for her. I would also look for a recommended Naturopath in your area and discuss it with him/her and try some herbal remedies. You can get Animal Chiropractors and holistic clinics too and they can have some very good results and/or suggestions. The Tellington Touch, Naturopath and Chiropractors should all be able to relieve some of her anxieties. I have also found a very good article on 'separation anxiety' http://www.petalia.com.au/templates/storytemplate_process.cfm?specie=dogs&story_no=44#ct-4 - although, personally, I would be very hesitant about putting her on any drugs - although they can have their place, they should be used in conjunction with behaviour modification and short term. I would suggest that you talk to your Vet and/or discuss it with an Animal Behaviourist.
Good luck.