I'm always suspicious of any drug that says "you'll lose weight without even trying!"
Best bet always, is to eat properly, adding many fresh produce items to your meals, and good old exercise.
BTW, we have a member here, Kyles, who lost 30 lbs, doing just that. Look in the health & nutrition forum and she chronicals some of her regimens.
Side note: as for the anxiety, often, good food will help, but it's best to speak with your physician about things like this.
Best of luck to you!