Used primarily as a smoking cessation aid, this chemical acts as a partial agonist on nicotinic acetylcholine receptors in the brain. It reduces withdrawal symptoms and diminishes the pleasurable effects of smoking by blocking nicotine from binding to these receptors. Patients typically begin treatment while still smoking, with a planned quit date within the first few weeks of use. It helps reduce cravings and prevents relapse by maintaining moderate receptor activation without the full stimulatory effect of nicotine. Commonly prescribed in tablet form, it is taken orally over a 12-week course, which may be extended for additional support.