I was really nervous going into it, as I had heard horror stories. As soon as it kicked in
, I had the worst panic attack of my life. I really thought I was going to die some how, and I couldn't even stand up because I was so lightheaded and faint. That lasted for about 20 minutes, then I felt great. For the next couple of weeks, I had panic attacks, and actually went to the ER and explained it to the doctor. He said that it probably would go away, but it's been a while.