I suffer from panic disorder for that I was on serta 100mg and clonotril 0.25mg everyday for a year. Recently 2 months ago I started getting panic attacks agajn so the doctor prescribed me alprax 0.25mg and serta 50mg. I have been taking it since two months. Recently I have been feeling dizzy and having flutters and palpitations after walking for a few minutes and my heart rate goes to 110/120 just by standing up. I have been researching about my medications and have read that these medications can cause acquired long qt syndrome or other cardiac issues. I wanted to know if these medications are safe or should I stop taking them.