Varenicline
"I have been a packet a day smoker for 32 years, until a persistent cough noted by my GP sent me off for a chest xray. Diagnosis = COPD!!  I commenced Champix with mixed feelings....I really did love my ciggies and could not imagine my life without them.  I did not pick a stop day  and on day 4 noted I had cut my packet a day to now lasting 2 days. I lite my last cigarette on the morning of day 10, took 3 draws and thought YUK!!! That was 2 weeks ago now and honestly the smell or even the thought of inhaling a cigarette makes me sick and literally feel my stomach doing tumble turns!!!!  I still get the nausea lasting up to 2 hours even with food....but have rewarded myself with a piece of jewellery with money saved so far!!!!"