Cytisine is a naturally occurring alkaloid (chemical formula: C₁₁H₁₄N₂O) extracted from plants such as Laburnum anagyroides. As a specialty chemical, it is used in pharmaceutical research and development, particularly for its interaction with nicotinic acetylcholine receptors. It is primarily employed as a smoking cessation aid due to its ability to bind to these receptors in the brain, similar to nicotine, helping to reduce withdrawal symptoms and cravings. Marketed as a natural alternative to medications like varenicline or nicotine replacement therapies, cytisine has demonstrated effectiveness in clinical studies, with evidence of comparable or superior success rates. It is more affordable, enhancing accessibility in low- and middle-income countries. Emerging research explores its neuroprotective and anti-inflammatory properties, though these are not yet clinically established. Potential side effects include nausea, dizziness, and headache; use under medical supervision is recommended.