As for meds, the Mexiletine is a sodium channel blocker, and the Metoprolol
is a beta blocker. I think you know a lot about general terms, but when I tell you the exact med, you don't know what it is. Wikipedia can be your friend, too.
I have no dizziness, fainting, or breathing problems. I feel normal, except the awareness of the early beats occasionally (usually only when I am sitting quietly or in bed).