Anyone else have an issue with the Topiramate?

My doctor prescribed me Phentermine and Topiramate (separate pills). The Phenteramine in the morning is doing a great job of quieting the food noise and while it makes me feel more focused, I don't feel amped up. However, when I take the Topiramate in the evening, the Topiramate makes me go from sleepy to wide awake, jittery and my heart starts pounding in my chest.
Has anyone else experienced this with the Topiramate?