I've had problems with light headed-ness and dizziness on Atkins from the get-go. I've been on it 4 months now, and it's still a bit of a problem.

I've found that taking supplements helps - I take a calcium magnesium combo and 250 mg. potassium pills after most meals, and I also use NuSalt at home instead of normal salt as an additional potassium source. (It seems that it isn't safe to take the amount of potassium that you need in pill form, it's apparently very hard on the stomach).

Someone suggested that I get my blood pressure checked - haven't done that yet, but I guess I should. Thanks for reminding me!