I used to get WANGING headaches, when I got bit by my sister's Chow-Chow, I went to the Emergency Room for a tetanus shot, my BP was peggin' the needle. Started on meds, my BP is a helluva lot better, I still have headaches, but they are like an order of magnitude lower in intensity & duration than before. I'm NOT a violent person, but if I could have ever hurt myself or someone else, it would have been when I was under the thumb of one of those headaches...I haven't had one of those "cross-yer-eyes" ones since I started on BP meds. Yeah, I had the loss-of-vision, seeing "sparklies", sick-to-your-stomach, all that other stuff. Mucho fun.