I went to the emergency room during a panic attack about a month ago. I thought I was going to die. It lasted for about an hour and a half so I had my husband take me in. They checked my blood pressure immediately and it was very high. It was 155 over 105. They then checked my blood sugar and it was 105 which was normal. I did take an alpralazam (xanax)and by the time I left there, 2 hours later, my pressure came down to normal. They said your blood pressure does increase during a panic attack and let me tell you, they are right about that. I was so hot, yet my whole body was shivering, including my legs. It lasted over an hour until the xanax kicked in. I don't want to get addicted to xanax and would like a more natural cure but for now, it gets me through these attacks. I am also take a good B complex daily and I never touch caffeine. Caffeine will send me back to the Emergency room! I am not even kidding! I don't know why, but it does cause an panic attack. Ask your doctor and he/she can confirm this.