My husband was on this diet for over a year and a half. He dropped 125lbs. which was wonderful for his ego.
He had alot of extra energy at first but he also experienced a 2 week stay in the hospital within the first 3 months of the diet.
My husband was impacted which was extremely painful.
However with the help of psilium husk pills from the health store and multi vitamins he was able to remain on the diet.

To keep a household running on this diet was difficult.
It involves creating special meals for him.
We found ways to work around it, but it took some definite will power for him not to want the same meals myself and our daughter was having.

When I became pregnant with our second child I had to start cooking different for myself and he decided to drop the diet.
He is now 80lbs. heavier than he was prior to beginning the diet.

After numerous blood tests and physicals, the doctor explainned that the Atkins diet trainned his body not to burn fats naturally and that instead of burning the fat it was just burning carbs.
He is now on a dietary pill called Xenical that attacks the fat directly for him

I would seek medical advise and possibly sit down with a nutritionist.