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As such it has been prescribed all over the world by leading physicians and pediatricians , latest review and restospective studies suggest that it has no significant role in treatment of dry cough or croup.

The researchers reviewed 135 mild to moderate cases of croup in children who were treated with humidified air in a hospital or not treated at all. After looking at factors like mortality, the progression of symptoms and the number of school days missed, the researchers found that children with croup did “not improve greatly with inhalation of humidified air”.

The study appears in the latest issue of The Cochrane Library, which examines research in health care. The authors say the apparent benefits of humidified air may have more to do with secondary factors such as the calming effect of a parent’s presence or encouragement to take deep breaths.

So conclusion is though we have long history and belief in humidified air in treatment of croup, but it seems that it does not have any role in treatment.