If you want to see why the FAA doesn't like it see -
http://us.gsk.com/products/assets/us_zyban.pdf It doesn't look much
like aspirin to me and is not used for depression.

Why not can the Zyban? Shortly after I quit, cigarettes started
smelling bad and I lost my desire to start again. After all these
years you would think it would be the same for you.

One thing you might consider - The internist that takes care of me is
also my flight surgeon. He won't give me anything that disqualifies
me to fly.

Guess you have to decide what's important to you. Smoking, taking
drugs, or flying airplanes. I know where I'd be on that.