Nicotine 4 mg formulations, such as chewing gums, lozenges, or sublingual tablets, are primarily used as nicotine replacement therapy (NRT) to help individuals quit smoking by reducing withdrawal symptoms and cravings. They provide a controlled, lower dose of nicotine compared to cigarettes, allowing the body to gradually adjust while breaking the behavioral habit of smoking. Nicotine 4 mg is often recommended for those with mild to moderate dependence, and it can be taken at regular intervals when cravings occur. Over time, the frequency of use is reduced, helping the individual transition toward complete nicotine independence.