Nicotine Polacrilex Gum sugar-free chewing pieces provide nicotine to your system - they work as a temporary aid to help you quit smoking by reducing nicotine withdrawal symptoms. Nicotine Polacrilex Gum provides a lower level of nicotine to your blood than cigarettes, and allows you to gradually do away with your body?s need for nicotine. Because Nicotine Polacrilex Gum does not contain the tar or carbon monoxide of cigarette smoke, it does not have the same health dangers as tobacco. However, it still delivers nicotine, the addictive part of cigarette smoke. Nicotine can cause side effects such as headache, nausea, upset stomach, and dizziness.