Just read Dr Lams site, it'll give you the full low down, but just ignore his scaremongering and marketing!
Milk Thistle helps detox an protect the liver. If your having adrenaline surges, it probably means your cortisol is low, so natural detoxification and metabolic process have been downgraded to compensate
I can say almost all of us have had the 3-4am adrenaline surges at some point in AF normally at the start