Methacholine Lung Challenge

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Despite the widespread incidence and seriousness of COPD, studies strongly suggest that it is underdiagnosed, especially in women. Some experts recommend that any adult smoker who complains of a daily cough should be screened for COPD. In one study, nearly half of patients over age 60 who regularly smoked had COPD. Anyone who has a chronic cough, increased phlegm production, or breathing difficulty that gets worse over time should be checked for the disease.

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