I have been on flec for a few years now. O had PVC's in the thousands on a three week halter monitor. Couldn't control them on a variety of meds. Went to a different cardiologist, he put me on flec 50 mg twice a day. Ineffective. Increased to 100 mg twice a day. Huge improvement. Recently went to a different cardiologist because that one moved out of the area. He said this drug is extremely dangerous and emphasized it several times. He leads the cardiology dept at the local hospital and of the thousands of people he sees few are on it. After a stress test he advised me to stay on it but referred me to a electophysiologist. She said it was safe as long as I had no previous heart attack. Here's the thing. Supposedly this node is in a place that makes it risky for an eblation. So I'm kinda stuck with treating it with meds. I fought and trained MMA. After a few years off due to a shoulder injury and a bout with depression after the whole thing I returned to training in Krav Maga. Just a few months ago. I realize I had some deconditioning. But it was horrible. Now this was one hour of non stop aggressive fighting many times against multiple attackers. After 10 minutes I was in a state of near death. Well it felt like it. Could not catch my breath barely able to breathe and damn scary. So of course I pushed myself harder kept going assuming my stamina would build over time and I started to get stronger. Remember I am 49 but always in pretty good shape. I just could not seem to build any stamina. After a couple months the fear kept me from continuing. When I recently saw the electro doc she said because the flec controls my heart rate I am unable to get it high enough for me to build the stamina I am trying to build. Does that make sense. She did decrease my dose. I now take 100mg in the am and 50 mg at night. I think because in her opinion Ines's maxed out and she may have wanted to decrease it so if I need a higher dose later on she had somewhere to go. I have yet started to fight again for fear I may indeed push too hard and cause damage. I am not ready yet to accept my limitations. But I suppose I may have too. Even heavy weight training. Leaves me breathless. Not as bad but noticeable. I also take arginine in relatively high doses but not too far out of recommended doses. Creatine. High protein intake magnesium and calcium. And men's daily vitamins. And can someone explain the Epsom salt thing. Never heard of that. Thanks.