Cytisine is primarily used as a smoking cessation aid. It works by binding to nicotinic acetylcholine receptors in the brain, reducing the withdrawal symptoms and cravings associated with nicotine addiction. Its mechanism is similar to that of nicotine, but it acts as a partial agonist, helping to wean the brain off nicotine gradually. Cytisine has been used for decades in Eastern Europe and has gained attention globally due to clinical studies showing its effectiveness and low cost compared to other smoking cessation treatments. It is typically administered orally in tablet form over a period of several weeks. In addition to its use in smoking cessation, cytisine has been studied for potential applications in managing other addictive behaviors, though research in these areas is still preliminary.