La tujona, conocida en otros países como thujone, es un aceite esencial relacionado químicamente con el alcanfor. Posee acción analéptica y convulsivante.

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Thujone (/ˈθuːdʒoʊn/) is a ketone and a monoterpene that occurs naturally in two diastereomeric forms: (−)-α-thujone and (+)-β-thujone. It has a menthol odor. Though it is best known as a chemical compound in the spirit absinthe, which contains only small quantities of thujone, it is unlikely to be responsible for absinthe's alleged psychedelic effects. Thujone acts on GABA and 5-HT3 receptors in the brain. In many countries, the amount of thujone allowed in food or drink products is regulated. Thujone, as a component of several essential oils, is also used in perfumery. In addition to the naturally occurring (−)-α-thujone and (+)-β-thujone, two other enantiomeric forms are possible: (+)-α-thujone and (−)-β-thujone: \n* (−)-α-thujone \n* (+)-α-thujone \n* (+)-β-thujone \n* (−)-β-thujone

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