Chantix, which works on specific parts of the brain, helps people give up smoking in two ways: -- It provides some satisfaction that nicotine gives, hence lessening withdrawal symptoms -- It blocks the nicotine from entering relevant parts of the brain, thus eliminating the reward a smoker feels when he/she smokes Addiction to nicotine is a habit that is very difficult for many smokers to quit. When smokers inhale smoke from a cigarette, nicotine reaches the brain within seconds and...