Parenteral or oral corticosteroids 30 days Nasal corticosteroids 30 days Topical use of flurandrenolide 30 days Topical use of clobetasol propionate 30 days Topical use of halobetasol propionate 30 days Astemizole 30 days Ketotifene 21 days Nedocromil or Sodium cromoglycate 14 days Loratadine 10 days Cetirizine 7 days Antileukotrienes 7 days Other H1 antihistamine 3 days Nasal decongestant 3 days Any food supplements including probiotics 3 days