I found a cure for my vasovagal episodes almost 3 and 4 a morning. I am in the medical field but not a doctor. I did a search on which neurotransmitters effect vasovagal and found several studies considering an imbalance of nor-epinephrine as the problem. Several studies used a herb called Yohimbine a alpha -2-antagnoist and all their patients recovered from vaso vagal. i ordered Yohimbine and tried it. I had to cut the dose down to a quarter of the capsule because it raised myy blood pressure quite a bit. I also went to a holistic doctor he gave me a minute dose of hyderocortisone. I haven't had a vasovagal episode in 3 weeks . It was ruining my life and making it difficult for me to work. I want to find a way to pass this information on to others.