 you're not going to lose the rapid weight. And I don't want you to lose the weight rapidly. My guess is those people losing rapid weight are the ones that aren't even eating meals. They're going all day without eating. This is not supposed to be a medicine to help you fast. Your body needs nutrition. Now, before you even go on these medications, check your thyroid. If your thyroid is underactive, you could have an issue with your weight and your metabolism.