TITLE

Influence cigarette smoking on inhaled corticosteroid treatment in mild asthma

AUTHOR(S)
Chalmers, G. W.; Macleod, K. J.; Little, S. A.; Thomson, L. J.; McSharry, C. P.; Thomson, N. C.
PUB. DATE
March 2002
SOURCE
Thorax;Mar2002, Vol. 57 Issue 3, p226
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Background: Although inhaled corticosteroids have an established role in the treatment of asthma, studies have tended to concentrate on non-smokers and little is known about the possible effect of cigarette smoking on the efficacy of treatment with inhaled steroids in asthma. A study was undertaken to investigate the effect of active cigarette smoking on responses to treatment with inhaled corticosteroids in patients with mild asthma. Methods: The effect of treatment with inhaled fluticasone propionate (1000 μg daily) or placebo for 3 weeks was studied in a double blind, prospective, randomised, placebo controlled study of 38 steroid naïve adult asthmatic patients (21 non-smokers). Efficacy was assessed using morning and evening peak expiratory flow (PEE) readings, spirometric parameters, bronchial hyperreactivity, and sputum eosinophil counts. Comparison was made between responses to treatment in non-smoking and smoking asthmatic patients. Results: There was a significantly greater increase in mean morning PEE in non-smokers than in smokers following inhaled fluticasone (27 l/mm v -5 l/mm). Non-smokers had a statistically significant increase in mean morning PEF (27 l/mm), mean forced expiratory volume in l second (0.17 l), and geometric mean PC20 (2.6 doubling doses), and a significant decrease in the proportion of sputum eosinophils(-l .75%) after fluticasone compared with placebo. No significant changes were observed in the smoking asthmatic patients for any of these parameters. Conclusions: Active cigarette smoking impairs the efficacy of short term inhaled corticosteroid treatment in mild asthma. This finding has important implications for the management of patients with mild asthma who smoke.
ACCESSION #
12915252

 

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