Nicotine polacrilex is a resin complex formed by binding nicotine to an ion-exchange resin, typically in the form of a gum or lozenge. The exact chemical structure of nicotine polacrilex is proprietary and not publicly disclosed by the manufacturers. However, the general concept involves incorporating nicotine into a resin matrix, allowing for controlled release and absorption of nicotine through the oral mucosa when chewed or dissolved. This controlled release mechanism helps reduce cravings and withdrawal symptoms in individuals trying to quit smoking. While the specific chemical structure may vary between manufacturers, the overall function of nicotine polacrilex remains consistent across products.