I'm not having an issue on 150mg XR at the moment. I'm still titrating up to 300mg final. One of the things I read that has helped me is to make sure you take your dose 12 hours before you need to wake up.

FYI, It's my understanding the higher the dose, the less zombie like/drowsy you'll be. The low doses are used for sleep aid's and such. Might be worth a shot to increase up and see if it will work for you.