I have not had panic attacks until I was on lexapro 3 weeks ago for 2 days, stopped for 4 days and started on fluvixamie now for 2 weeks. Stared with a half dose of the 25 mg for one week, then stared taking the full pill of 25 mg for one week. Started taking to pills yesterday, so 50 mg. I have been having panic like attacks only while driving.