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Drinking alcohol may cause rhinitis as well as worsen asthma (see alcohol-induced respiratory reactions ). In certain populations, particularly those of East Asian countries such as Japan, these reactions have a nonallergic basis.  In other populations, particularly those of European descent, a genetic variant in the gene that metabolizes ethanol to acetaldehyde, ADH1B, is associated with alcohol-induced rhinitis. It is suggested that this variant metabolizes ethanol to acetaldehyde too quickly for further processing by ALDH2 and thereby leads to the accumulation of acetaldehyde and rhinitis symptoms.   In these cases, alcohol-induced rhinitis may be of the mixed rhinitis type and, it seems likely, most cases of alcohol-induced rhinitis in non-Asian populations reflect true allergic response to the non-ethanol and/or contaminants in alcoholic beverages, particularly when these beverages are wines or beers.  Alcohol-exacerbated rhinitis is more frequent in individuals with a history of rhinitis exacerbated by aspirin.