Montelukast as a successful treatment for eosinophilic cystitis in an asthmatic woman patient

Eosinophilic cystitis (ec) is a rare inflammatory disorder. we herein report a case of ec in an asthmatic female patient who had a recent exacerbation with none known allergen. she was administered montelukast sodium orally for four weeks and received complete remission. this medication was successfully discontinued after a three-month follow up period. this case report about successful treatment of an adult ec patient using montelukast sodium may provide a new option for ec patients with allergic history.