People all around the world are using plants directly or indirectly to treat symptoms or illnesses. It is beneficial, if used in a conscious and controlled way. Among the plants of therapeutic potential, Baccharis trimera, popularly known as carqueja and belonging to the family Asteraceae, stands out for having several proven pharmacotherapeutic properties, specially in the treatment of liver problems and problems related to digestion. The present work has the objective of describing the chemical properties, pharmacological and toxicological effects of Baccharis trimera. For the accomplishment of the bibliographic research the databases Scielo, Lilacs and VHL.The most abundant secondary metabolites of the genus Baccharis are flavonoids and terpenes, which confer several pharmacological attributes to the plant, specially antioxidant, antiviral, anti-inflammatory , antimicrobial and antiparasitic. However, there are also contraindications of the vegetable. Due to the abortive effect, the plant should not be consumed during gestation or lactation periods and, because of the hypotensive property, its consumption by hypotensive people is not recommended. Like other vegetables, the carqueja has benefits and harms. Therefore, before consuming plants and derivatives, one must be aware of its chemical properties and pharmacological effects, being necessary the orientation by a qualified professional to ensure a responsible and beneficial use.