"Cytisine has been available in the former socialist economy countries of eastern Europe since 1964. Made by the Bulgarian drug company Sopharma AD and sold as Tabex, it has never been available to most of the rest of the world. A new study from New Zealand reported in the Dec. 18 New England Journal of Medicine compared the cessation results of cytisine to varenicline." http://www.winonadailynews.com Tobacco is likely the most addictive chemical we humans encounter (except maybe for Oreo cookies.