Nicotine is a drug that is inhaled from the tobacco in cigarettes. It gets into the bloodstream and stimulates the brain. Most regular smokers are addicted to nicotine. Many people who want to stop smoking fail to succeed because nicotine addiction is strong and difficult to break. This is where nicotine replacement therapy (NRT) can help.
This is a companion discussion topic for the original article at https://patient.info/medicine/nicotine-replacement-therapy-products-nicorette-nicotinell-niquitin