I wound up in full blown Benzo withdrawal back in 2005. Not a big dose but 1mg-2mg of ativan at night for 2 years, then had surgery, where they gave me versed, which sent me into withdrawal that night. In the previous 2 years I never had any w/d symptoms. But that night my Heart rate went up to about 150, and all the cns overstimulation you could ask for. I waited 2 weeks to get into rehab and tried to get by on as low of a dose as I could. When I got into treatment, they used Serax, and put me on a really HIGH dose (45mg) 4 times a day. That high dose made me feel better. Then it was tapered it down every 3 days or so. It took about 18 days to get completely off it, and IT WAS NOT FUN. Head zaps (cns electricity), stomach growling, etc. If anyone is in that situation where their heart is racing, I think you're going to need a long medical detox.