Leaves and bark are used.It contains alkaloids (boldine), essential oil (ascaridol), coumarins and tannins.Properties attributed are: digestive, cholagogue, diuretic.Indications Commission E of the German Ministry of Health: dyspepsia. The essential oil is toxic and very irritating because the content of ascaridol. There have appeared states of hallucination, behavioral disturbances and liver toxicity after consumption of boldo tea. At last update there were not found published data on excretion in breast milk. Given its toxicity it seems prudent not to consume while breastfeeding or do so only occasionally.