Varenicline
"I'm 58 and was a pack a day smoker for 15 years. After one day on the pills I stopped smoking. It's too easy. Minor side effects.  The second week I went onto half dosage. Because I could. Don't recommend. I'm on 25 days now, 25% dosage. I'll continue for a few weeks, gradually reduce the dosage. 

Libido up. Feeling strong. 

I recommend with all my heart."