Epazote is commonly believed to prevent flatulence. It has also been used in the treatment of amenorrhea,[4] dysmenorrhea, malaria, chorea, the now discredited diagnosis of hysteria, catarrh, and asthma.[5] Some of its chemical constituents have been shown in the laboratory to affect certain cancer cell lines,[6] and it has also been reported to be highly carcinogenic in rats.[7] A Nigerian group, however, concluded in 2007 that it is neither mutagenic nor cytotoxic.[8]