Wellbutrin day 1 on wellburtin xl 150 mg once a day im trying to figure when its best to take this pill, few hours after taking first pill got TERRIBLE nagging headache but felt very sleepy at times, never been big sleeper anyway,but needing it to give energy,stop smoking BUT after reading all this IM SCARED to continue PLEASE ANYONE WITH GOOD RESULTS how long does it take to stop the headaches,fogginess in the head,lots of pressure in head last night when trying to go to sleep i took first pill at 12:30 pm today took at 11:30 am WHEN DOES THE ENERGY COME????? IS THIS REALLY A BAD DRUG DOCTOR SAID IT WAS REALLY GOOD!!!!!!!!!!!!!