Varenicline
"I am 66 years old and after 50 (yes,50) years of smoking, I proudly say I am an ex smoker!
I was making ready for ankle surgery and my doctor told me I would probably heal better if I did not smoke.  The time was perfect to quit.  I got a prescription for Chantix.  I took it as directed.
My last cigarette was October 7, 2015 - the day before my surgery.  I am so happy to be an ex smoker!"