title: Rapid effect of inhaled steroids on nocturnal worsening of asthma.
abstract: BACKGROUND
  Inhaled steroids are the most commonly used anti-inflammatory agents for asthma and are increasingly recognised as having a more rapid onset of action than was previously thought. We have investigated the effect of a single dose of inhaled steroid on nocturnal worsening of asthma.
  
  
  METHODS
  Ten patients with steroid naive moderate asthma and nocturnal asthma participated in a randomised, double blind, placebo controlled, crossover trial. Participants spent three nights in the laboratory, one week apart. On each night they underwent spirometric testing at 16.00 hours and received one of the three treatments (placebo, beclomethasone 1000 micro g, or fluticasone 1000 micro g) delivered by metered dose inhaler. Spirometric tests were repeated at 04.00 hours the following morning.
  
  
  RESULTS
  Following placebo administration the mean (SE) overnight fall in FEV(1) was 0.65 (0.27) l compared with -0.02 (0.13) l following fluticasone (p=0.019) and 0.23 (0.12) l following beclomethasone (p=0.048 v placebo).
  
  
  CONCLUSIONS
  A single dose of inhaled steroid (within the therapeutic range) reduced the fall in FEV(1) in patients with nocturnal asthma when administered at 16.00 hours. Nocturnal worsening of asthma is a useful model for testing inhaled steroid activity in a single night study.
authors.affiliation: Department of Medicine, University of S Paulo Medical School at Ribeirão Preto, Brazil.
authors.forename: G
authors.initials: G
authors.lastname: Frezza
authors.forename: J
authors.initials: J
authors.lastname: Terra-Filho
authors.forename: J A B
authors.initials: JA
authors.lastname: Martinez
authors.forename: E O
authors.initials: EO
authors.lastname: Vianna
mesh_terms: D000280:Administration, Inhalation; D000328:Adult; D000730:Androstadienes / Q000008:administration & dosage*; D018927:Anti-Asthmatic Agents / Q000008:administration & dosage*; D000893:Anti-Inflammatory Agents / Q000008:administration & dosage*; D001249:Asthma / Q000188:drug therapy*; D001507:Beclomethasone / Q000008:administration & dosage*; D018592:Cross-Over Studies; D004311:Double-Blind Method; D005260:Female; D000068298:Fluticasone; D005541:Forced Expiratory Volume / Q000187:drug effects; D006801:Humans; D008297:Male; D008875:Middle Aged
chemical_list: D000730:Androstadienes; D018927:Anti-Asthmatic Agents; D000893:Anti-Inflammatory Agents; D000068298:Fluticasone; D001507:Beclomethasone