Hi, CatdaBratt. I believe Avandia is on the list in DANDR as medications which can stall weight loss. Lipitor is another one that Dr. A prefers that we avoid if possible (but I know that is not always possible depending on your doctor's advice). For diabetics Glucophage (Metformin) is the preferred medication. Hormone medications can also cause weight problems.
However, since you indicate that you are in ketosis on a regular basis, I suspect perhaps that you may need to reduce your calories. Even though calories are not a focus in a lc diet, they do count. The metabolic advantage of lc for me is probably about 200-300 calories more than someone who is pulling up a standard caloric/activity/height/weight count like on fitday. But that can easily disappear with a wedge of cheese and a handful of nuts.
The ballpark for women is 1800 calories per day, but I know a lot of women who find that in order to get the weight loss going they need to eat a bit less.
I would suggest using
http://www.fitday.com to track your nutritional breakdown.
All of our metabolisms are completely different, it's definitely not a one-size-fits-all issue.
You may also consider that if you have been doing a lot of exercise that you may have been building some muscle mass but still reducing your body fat giving a reduced net weight loss but a much improved internal profile.
If you consume sugar alcohols, those could be stalling you out as well. In fact to get a good picture, count them as if they were regular grams of sugar and see if that changes the nutrient wheel breakdown.
Also exercise and intensity are going to vary by person. If you really want to make exercise the key to weight loss, consider 1-2 hours of vigorous exercise almost every day. Although it does sound as though one hour a day 4 days a week is a very good start.
In any case, I wish you the very best of luck and good health.