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Related to Larrea tridentata: creosote bush
A drought-adapted evergreen, the major component of which is nordihydroguaiaretic acid (NDGA), which may be used to treat GI tumours, leukaemia and brain gliomas.
Chaparral was once used by Native American herbalists as an antiarthritic and antitussive (effects that have not been confirmed by modern herbalists), for diarrhoea and other GI complaints, and topically for wounds.
Chaparral causes cramping, nausea and vomiting.