Buspirone
"My panic disorder started very gradually. At first it was a slight panic that lasted for a min or two when I was driving, then it slowly intruded into my life. At some worst points I was unable to sleep for a week. I might be able to doze off for an hour or two, and then I'd wake up with a racing heart. Buspar helped at first, I was only on 5mg for five months, never went up in dose. After about 5 months, stressful events like job interviews pretty much made this med ineffective for me. I really liked this med as it had no side effects for me. No dizziness or nausea or "brain zaps". My doctor put me on Paxil instead. Just started it, but it seems to be working. My pulse is still about 20 beats above my normal rate, but it doesn't bother me."