Exhaled nitric oxide before and after montelukast sodium therapy in school‐age children with chronic asthma: A preliminary study

Exhaled nitric oxide (ENO) is a surrogate marker of airway inflammation in asthma. In 12 children aged 6–11 years with mild to moderate persistent asthma, ENO concentrations were measured before and after 4 weeks of treatment with montelukast sodium, a leukotriene receptor antagonist, and 2 weeks after withdrawal of therapy.

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