I have a postive test result for tilt table test. With the diagnosis of secondary vasodepressor neurocardiogenic syncope. My Doctor said I need to take Beta blockers to avoid having another neurocardiogenic syncope or vasovagal syndrome. I have already had a MRI with contrast to rule out Brain problem, ENT cleared me of Veritgo, the Echo was clear aslo. I have tired Metroprolol made me foggy and completely tired. Bystolic was the same problem within 10 days. Carvodilol made me dizzy and after 10 days I got hives. Now I trying Atenolol with 2 doses I am really itchy. I have many drug related allergies. I am getting tired and my doctor said she has never had a patient to have allergies to beta blockers. Does anyone have the same problem with them?