I'm not sure you this would help you. I just did a search of this forum (Does it Work) and found 27 other threads about the product, most of which involved complaints and warnings by the FDA and FTC.
Even if you take a product like Cortislim, you still have to cut back food intake or you won't lose weight. The cortislim website promotes a healthy diet. If you follow the healthy diet like they recommend, you won't need a pill.
Have you considered a different type of kickstart such as Phase 1 of the South Beach Diet? It's restrictive but still balanced, and can result in dropping weight quickly for two weeks. Then you gradually add food back into your diet. Best of all, there are no dangerous side effects or FDA warnings. It's a sure thing.