Atkins states you can stay on induction for 6 months or more. The problem is for some they get really bored.

It's also not a great idea to stay on induciton until you're goal because you don't learn you carb tolerence level, food intolerences, and so on.

If you are having cravings and starting to feel bad, you might want to examine the foods you have added. There may be a hidden source of carbs, or a food you have an intolerence too.