Topical and systemic steroids constitute the first choice in medical treatment for nasal polyps. This study aimed to evaluate the efficacy and safety of a short course of budesonide inhalation suspension via transnasal nebulization in the preoperative management of chronic rhinosinusitis with nasal polyposis. The second aim was to compare budesonide inhalation suspension with budesonide aqueous nasal spray and oral prednisone in nasal polyp treatment.