I was trying out Wellbutrin(Bupropion). I was curious about it since I have never been on a dopamine reuptake inhibitor before. It was day two and I took 150mg. At night I got the worst constipation of my life. I was farting every 5 seconds(thank god they weren't smelly or I would have taken out my whole neighborhood) and was unable to have a bowel movement. I also got insomnia(another of its side effect) and due to being too tired and not getting enough sleep it triggered anxiety and panic. I quickly took 1 mg ativan and propranolol to calm myself down and quickly went to sleep. Oh well on to the next med.