Which plant contains thujone in its constituents and is used for warts, respiratory infections, and skin conditions?

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The plant that contains thujone and has historical use for warts, respiratory infections, and skin conditions is Thuja occidentalis. Thujone is a volatile constituent found in thuja essential oil and related products. In traditional herbal medicine, preparations from Thuja are used topically for warts and skin disorders and sometimes for bronchial or other respiratory symptoms, reflecting its antiseptic and keratolytic-like properties. However, internal use of thuja preparations must be approached with great caution due to thujone’s toxicity.

The other plants listed do not contain thujone and are associated with different main actions: Vitex agnus-castus (chaste tree) is used mainly for hormonal and gynecological concerns; Vinca major (periwinkle) has alkaloids affecting vascular and CNS systems and is used for different indications; Viscum album (mistletoe) contains mistletoe lectins with immune-modulating effects and is not linked to thujone.