Im looking for a very powerful energy pill. Help!?

Im trying to get back in shape so that I can run five miles again. When I first began running five miles I used a pill called Takeoff. It worked very well for about 3 months but then my body got used to it. I need something even better but I would prefer it to not have caffenine in it. Basically I need something that will give me a lot of energy for at least a hour or two. Thanks!!!