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Despite widespread use in over-the-counter agents and vapors, there is not enough scientific evidence to recommend use of eucalyptus oil as a decongestant-expectorant (by mouth or inhaled form). The available studies are of poor quality, and have used combination therapies or 1,8-cineole (eucalyptol), which is a component of eucalyptus. Further studies are needed before a firm conclusion can be made. Copyright © 2007 Natural Standard Inc. |