considering mast cell activation might be an issue as well as mito damage. i am reading that especially propranolol and metaprolol inhibit CoQ10-dependent enzymes which can exacerbate mito issues.. also considering i need to take a binder like charcoal and or csm for biotoxins. finally realized that my tachy crashes while on csm (not for long...) are because toprol xl stays in intestines at least 12 if not 20 hours.. any thoughts on atenolol and bystolic.. what concerns me about bystolic is that it raises NO levels. clonadine??? i wish there was a natural alternative to getting tachy and adrenaline activity down. thank you!!