Convincing people to not fool around never worked so the birth control pill was invented to allow people to indulge with less consequences. I recall someone (I forget who) said that things that prevent you from eating will never work and the only solution is something that allows you to indulge without the consequences. Does this drug allow you to indulge without consequences or does it make you not want to eat? If its the later, I bet that it won't have long term success.

Edit: A drug that allows you to indulge without consequence in this context would be a bad thing. It would allow people to eat non-stop without the consequences and would increase the demand for food in the modern nations to unreasonable levels. If you think about it, this kind of drug would have the same outcome as bulimia (think, hunger games).