Best Weight Loss Pills?

My fiancée and I are currently trying to lose weight.  We are eating healthier and she is counting calories like crazy.  We have been thinking about using pills to help with our weight loss program.  We have been researching the different pills and are unsure about which ones are the best weight loss pills and will help us get the results we are working for.  We have dietary supplements but not any good weight loss pills.  Any ideas would be helpful.