Varenicline
"My boyfriend and I are on day 7. I have the metallic taste in my mouth, and am tired. Chantix has curbed my urge to smoke and surprisingly I don't even want a beer anymore, which of course is GREAT. I went from smoking a pack a day to having only 1 to 3 cigarettes a day. I can go outside with my co-workers while they smoke, and it doesn't bother me. My boyfriends symptoms as of today:  he is very tired, has developed feelings of anxiety, gags and feels nauseated when he attempts to smoke a cigarette. He had a check up at the doctor's today and his heart beat went from 72 (last week) to 53 today. They did an ECG on him, and told him to go home and rest for a couple of days. "