A person can choose to purchase tobacco products, such as e-cigarettes, or nicotine replacement products that contain nicotine, such as nicotine gum and patches. Many of the products listed are marketed as "tobacco-free" products. Nicotine is an addictive drug that is found in tobacco. It is an important part of smoking and can be detected in urine. Nicotine also affects the brain in the same way as smoking. It causes withdrawal symptoms. A nicotine replacement product is one that contains no tobacco but contains a synthetic chemical to make it less addictive. There are many types of nicotine replacement products available. They vary in quality but are all used to quit smoking. The withdrawal from smoking is usually not that bad. Many people report that the withdrawal can be relieved by the nicotine-replacement products that they buy. The best nicotine replacement products are not available over-the-counter.
I am a physician. I have studied the science behind the use of tobacco in the treatment of cancer. I have worked on many tobacco control programs in many countries and have seen the results. The evidence of harm from tobacco in cancer is strong. I have seen the evidence in support of the use of nicotine replacement therapy.