smoking cessation
"The first time I took Zyban was around 2004. I was on it for a week and I was amazed how it stopped the urge to smoke BUT the side effects were awful. I experienced anxiety and what felt like deep lows.  I would wake up sobbing for no reason but at least I didn't feel like a cigarette! 
I'm in Australia and pretty sure that we take the same levels of 150mg twice a day"