I did take such pills (Zyban) a couple of years ago, didn't smoke for around two months. Then, when I stopped taking the pills I had severe withdrawal symptoms and what appeared to be the beginning of a nasty depression. I started smoking again and things got back to normal. Bottom line: I wouldn't recommend those pills.
I AGREE I TRIED COLD TURKEY AND HAD SEVERE SIDE EFFECTS EVEN A DANGEROUS RISE IN MY BP.i THINK VYOU SHOULD TRY TO SLOW DONE GET HELP FROM A STOP SMOKING LINE THAT U CAN CFALL UNTIL YOU ARE ABLE TO QUIT.(SO SORRY I FORGOT MY CAPS ARE ON)