Hi Aboleyn!
If you are on any preventive medications, you should check with your doctor before you start a diet like this.
With some medications, they advise AGAINST this type of diet. Example: Topamax, low carb diets can possibly make the risk of kidney stones greater when doing a low carb diet.
I had to stop low carb dieting (Atkins, South Beach) while on Topamax because of this risk.