Budeprion SR Dosage

I asked my doctor for a prescription to help me stop smoking, I have been on Budeprion for 2 weeks at 150mg, twice a day, and I have not smoked for the last week. The last 4 nights I wake up in the middle of the night and have a diffucult time falling back to sleep.

I have found this very helpful with quitting smoking, but I'm wondering how long to stay on the medication and do I maintain the twice a day dosage, or can I go to once a day. Any suggestions?