I had that dizzy business so bad for so long that one morning I got up about 4AM to go to the bathroom and fell flat on my back, (hit my head hard, scared the devil out of my husband, etc,). Well I figured something seriously had to be done, so I thought about it and the biggest difference with Atkins and the way I used to eat was I used to eat a lot of fruit, (high in potassium), a real lot, and none on Atkins. So I added 1/4 tsp. Nusalt, which is pure potassium each AM and have been fine since. Nu salt is not No salt, they are different. To get the 600-700 mg. of potassium in capsuls you would have to take quite a few, you'd have to check label.
Well hope this helps!