Welcome back,
The above Sticky Newbie Advice also has a great deal on "Returning" I particularly like Dr Eades blog articles in this post. http://forum.lowcarber.org/showpost...6&postcount=163
Yes, age and medications will slow weight loss, but the number one issue is usually how you "Remember" Atkins induction. Re-read the rules, and measure and count the carbs, and consider all the other tips he has there. also check the Tips and Stalls forum.