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The chewing of betel nut is expel wind, kill worms, remove phlegm, subdue bad odors, beautify the mouth, induce purification, and kindle passion. Because of its CNS stimulating effects, betel nut is used in a manner similar to the western use of tobacco or caffeine. Arecoline is responsible for some of the effects of betel quid chewing, such as alertness, increased stamina, a sense of well-being, euphoria, and salivation. Chewing the nut stimulates the flow of saliva to aid digestion. Betel nut also has been used to stimulate the appetite.
Betel nut's medical use is limited, and long-term negative reactions to betel quid chewing are well known. A decrease in positive symptoms among men with schizophrenia was attributed to betel nut consumption.