According to me, a good diet pill that you can use to lose weight is Phentermine, as it suppresses ones appetite. Some other good diet pills that you can use include Allli, Xenical, Diethylpropion and Phendimetrazine. However, these diet pills have side effects that one should look into before taking any of them. see http://www.livestrong.com/best-diet-pills/ for more details.
None of them! There has been so many recalls lately on diet pills. There are serious health risks with all of them, and isn't the point to loosing weight to be healthier? Try more natural alternatives, diet and exercise.