What does cytisine mean?
Cytisine is a bitter-tasting, crystalline alkaloid found naturally in plants of the legume family, most famously in laburnum, whose golden chains of flowers hide seeds containing this toxic compound. Chemically, it belongs to the same family of substances as nicotine and acts on the brain's nicotinic receptors, which explains both its toxicity and its therapeutic value: by partially stimulating these receptors, it can ease the cravings that make quitting smoking difficult. Although little known in many Western countries until recently, cytisine-based preparations have been prescribed for decades in parts of Central and Eastern Europe, where they have helped large numbers of smokers give up tobacco at low cost. The word also appears in toxicology, since poisoning from laburnum seeds is a recognised hazard for children and livestock. Cytisine is thus a term met chiefly in medical research, pharmacology, and plant science rather than casual conversation.
nounA bitter crystalline alkaloid found in laburnum and other members of the genus Cytisus, chemically similar to nicotine and used medicinally in some countries to help people stop smoking.
- A bitter crystalline alkaloid obtained from laburnum and related plants, acting on nicotinic acetylcholine receptors and used in some countries as an aid to smoking cessation.
"Cytisine, extracted from laburnum seeds, has been used for decades in Eastern Europe as a smoking-cessation aid."
"The researchers compared cytisine with varenicline for effectiveness in helping smokers quit."
"Laburnum is dangerous to livestock largely because its seeds contain cytisine."
Rarely pluralised; the plural would appear mainly in technical contexts referring to multiple preparations or derivatives of cytisine.
"Chemists have tested several modified cytosines... several derivatives of cytisine in the search for improved treatments."
Long before Western medicine noticed, doctors in Eastern Europe were helping smokers quit using an extract from poisonous laburnum seeds — cytisine.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of cytisine
The name cytisine derives from the genus Cytisus, the group of broom-like shrubs that includes some sources of the compound; Cytisus itself comes from the Greek kytisos, a name applied to certain woody leguminous plants in antiquity. The substance was isolated from laburnum in the nineteenth century, and its use in smoking cessation developed later, particularly in Eastern Europe.
How cytisine is actually used
Cytisine is primarily encountered in scientific, pharmacological, and medical contexts rather than everyday speech. It has long been marketed in parts of Central and Eastern Europe under names such as Tabex, and has attracted renewed research interest elsewhere as a low-cost smoking-cessation treatment.
Easily confused with cytisine
Cystine is a sulfur-containing amino acid formed from cysteine, whereas cytisine is a plant-derived alkaloid that acts on nicotinic receptors.
Nicotine is the addictive alkaloid of tobacco; cytisine is a structurally related but distinct alkaloid from laburnum used to reduce cravings for tobacco.