Pharmacological Activities Ambrosia acanthicarpa Infusion of whole plant abortifacient. Ground root placed in tooth for toothache. Dermatitis, a contact dermatitis to oleoresins of Compositae plants. Ceremonial. Ambrosia ambrosioides Fungicidal, antihemorrhagic, cytotoxic, analgesic. Roots infusion given to a woman after parturition; decoction of crushed roots taken by women for pains and menstrual hemorrhage. Poultice of warmed leaves applied to the chest to loosen a cough. Ambrosia arborescens Local application in skin infection. Ambrosia artemisiifolia Potentially allergenic sesquiterpene lactones. Dermatitis, a contact dermatitis to oleoresins. Plant decoction for diarrhea with bleeding. Roots decoction taken for menstrual troubles, roots infusion taken for stroke. Leaves disinfectant, antiinflammatory, febrifuge, antidote, astringent, antidiarrheal, emetic and antiemetic; crushed leaves rubbed on insect sting; leaves infusion taken for pneumonia, swe...