What Weight Loss Pills Work?!?

In 2010-2012 I dieted and exercised, and lost 65 pounds. In fall of 2012, I started a new medication for my Epilepsy. The medication has caused me to gain 25 pounds, while still dieting and exercising. I can’t stand being this size! I need to lose the extra weight, but don’t know what to do because what I’m trying isn’t working. What are some excellent weight loss pills that really work?!