Generic Champix is tested as an efficient curative for ceasing the addiction to smoke. The medicine functions by mimicking the influence of nicotine on the body which helps in reducing crave for smoking. The medicine also helps in truncating the withdrawal symptoms.
Varenicline, the main constituent of the drug, undermines the functions of nicotine and stops the signals to reach to the receptors in the brain. It creates a fake sense of satiation obtained from smoking. It then reduces the satisfaction obtained from nicotine which gradually leads to cessation of smoking.