This is BS. Toxic levels of caffeine? Coffee has been shown to have no effect what so ever on heart disease(raises the blood pressure somewhat), but this guy is saying the relative low amounts in cola did her in. The problem was she was doing something that lowered her Potassium level. Too much potassium will kill you and too little will also. More that likely she was on some kind of diuretic, which takes the potassium out of your body, and didn’t eat a proper diet(one banana per day or one orange will do it)to maintain potassium levels. Seriously doubt the coke did her in. As another FReeper pointed out, as much liquids as she drank she was probably diabetic, with the unending diabetic thirst.
All the phosphoric acid probably didn’t help either.