title: Inhaled corticosteroid for persistent cough following upper respiratory tract infection.
abstract: OBJECTIVE
  The aim of this study was to determine the clinical effect of inhaled corticosteroid treatment for persistent cough, post upper respiratory tract infection (URTI) in previously healthy individuals, and on bronchial hyperresponsiveness (BHR).
  
  
  METHODS
  This was a prospective, randomized, double-blinded, placebo-controlled study conducted at a university hospital. A total of 30 non-asthmatic, non-smoking patients who were >15 years old and who had persistent post-URTI cough for >3 weeks were assessed by a physical examination, CXR and spirometry, and were allocated to receive inhaled budesonide (400 microg/puff, twice daily) or placebo for 4 weeks. If a patient suffered from sinusitis, it was a requirement that it had been well treated. A symptom score (frequency of cough, frequency of coughing bouts, symptoms associated with cough, night-time cough, frequency of taking medications to relieve cough, and number of medications) was recorded at entry, and after 2 and 4 weeks of treatment. A methacholine challenge test was performed at entry and after 4 weeks of treatment.
  
  
  RESULTS
  The mean symptom scores for the treatment group (9.4) and the placebo group (9.8) at baseline were not significantly different (P=0.79), and no differences were found between the groups after week 2 and week 4 of treatment (3.93 and 4.27 vs 2.26 and 2.66, P=0.29). The mean change in symptom scores from baseline to week 2 and to week 4 of treatment were also not different between groups (5.93 and 5.6 vs 7.00 and 7.58, P=0.23). No difference between groups was found in the mean changes in FEV(1), FVC, and FEF(25--75%) after 4 weeks of treatment. A positive bronchial provocation test occurred in three patients (10%) but these were borderline.
  
  
  CONCLUSIONS
  Inhaled corticosteroid is ineffective in treating persistent post-URTI cough in previously healthy individuals.
authors.affiliation: Department of Medicine, Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Bangkok, Thailand. tepor@mahidol.ac.th
authors.forename: Prapaporn
authors.initials: P
authors.lastname: Pornsuriyasak
authors.forename: Poonkasem
authors.initials: P
authors.lastname: Charoenpan
authors.forename: Kulanee
authors.initials: K
authors.lastname: Vongvivat
authors.forename: Ammarin
authors.initials: A
authors.lastname: Thakkinstian
mesh_terms: D000280:Administration, Inhalation; D000328:Adult; D016535:Bronchial Hyperreactivity / Q000188:drug therapy*; D001993:Bronchodilator Agents / Q000008:administration & dosage*; D019819:Budesonide / Q000008:administration & dosage*; D003371:Cough / Q000188:drug therapy* / Q000382:microbiology; D004311:Double-Blind Method; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D012129:Respiratory Function Tests; D012141:Respiratory Tract Infections / Q000150:complications; D017211:Treatment Failure
chemical_list: D001993:Bronchodilator Agents; D019819:Budesonide