I wish I could say for sure. I know in Atkins book it says diuretics raise your blood sugar level and insulin levels, which would technically effect weight loss. But I think this would be for someone who is on them day after day, because Atkins is talking about people with high blood pressure who have to take diuretics. (like myself). So far this diet hasn't lowered my blood pressure so I'm stuck with taking meds. I would think that taking a diuretic would be similar to eating too many carbs which would spike your blood sugar level. Once you stop, it'll correct itself. This is just my conclusion!
Tricia