supraventricular tachycardia
"I was having heart palpitations everyday to the point where it was really scary for me.  Sometimes flutters, other times skipped beats and still others I can't explain.  Had holter monitor and stress test all came back fine, cardiologist told me nothing to worry about. Gave me this med 25 mg a day 1/2 tab am and 1/2 pm.  First week, tightness in my chest felt hard it was hard to breath and it made me extremely sleepy and spacy. Almost stopped taking med but I continued into my 2nd week after my Dr told me to continue side effects would subside.  I am so glad I took his advice, it's been 2 months and my palitations have subsided I get a few here and there but not as intense. This was a miracle drug for me."