Betel nut: A common drug used by naturalized citizens from India, Far EastAsia, and the South Pacific Islands

Betel nut is a common masticatory drug used in Far East Asia, India, and th e South Pacific. It is used daily by 600 million people worldwide, yet is u nknown to most Western physicians. As the world becomes more culturally and ethnically interconnected, emergency physicians will encounter the use of betel nut. Significant illness can be associated with its use, including as thma exacerbation, cholinergic crisis, cardiac arrhythmias, acute psychosis , milk-alkali syndrome, and oropharyngeal tumors. We describe its source, p harmacology, composition, presentation, and treatment in the emergency depa rtment.