Each box of Habitrol 2mg Gum contains 96 pieces of nicotine polacrilex gum intended to aid smoking cessation by reducing nicotine cravings and withdrawal symptoms. The nicotine is absorbed into the blood stream through the lining of the mouth when the gum is chewed. Habitrol 2mg CLASSIC gum contains approximately one third less nicotine than a cigarette, and allows you to avoid the harmful physical and chemical effects associated with smoking. The recommended minimum length of treatment is three months. You can follow the recommended 12-week dosage program, or you can use the gum as needed. Chewing a piece of Habitrol 2mg Classic gum at the onset of nicotine cravings should alleviate nicotine cravings and/or withdrawal symptoms. Common symptoms of nicotine withdrawal include mood swings, mild depression, trouble sleeping or concentrating, irritability and anxiety. Other physical symptoms may include headaches, sweating or intestinal discomfort.