If you are working out and eating healthy then a diet pill is not going to help you. Infact is may actually harm your body because these medicines are tough on your vital organs.
If working out and dieting has not dropped the 10 pounds you are looking to lose, then maybe you are at your optimal weight and the only thing that will help you to lose weight at that point is to lower your calorie intake. You will then begin to lose more weight because your calorie loss to calorie intake will be out of balance and you cannot help but to lose weight.
Before you take any of those supplements, you need to go to your doc and get a physical done to make sure you do not have any undiagnosed heart problems because these meds can and probably will kill you if you have any kind of a health issue.