I am someone who doesn't trust prescription diet pills. I have seen the damage they can do. I have had several family members lose vast amounts of weight on the prescription diet pills only to gain it back twice as fast after they gave them up. More than one of them became addicted to the prescription diet pills and had a heck of a time getting off of them. It was devastating to them to regain the original weight and more. Why do people take prescription diet pills? I can only speak for the ones I know personally. More often than not it was because they wanted something that worked fast and they didn't really want to bother with exercise. Some of them actually had a fear of feeling hungry. Whenever they were hungry they would literally panic and eat even if they had only eaten an hour or less ago. The prescription diet pills took away the feeling of hunger. I think the best way to lose weight is the old fashioned way of making healthy food choices and finding an exercise that is comfortable for you.