Diet aids such as Releana are not the best way to lose weight. While you might lose a considerable amount of weight on it, which might be nice, the chances of gaining it all back, once you go off the med are extremely high. I can't think of anyone I've ever known, who would stick to such a "diet" for any length of time.
You would be much better off with lifestyle changes, implementing a healthy diet and moderate exercise, making sure it's something you can stick with over the long haul.
Nope. Not worth the risks and side effects that come along with it.
http://www.ehow.com/about_5559056_side-effects-releana.html