Thursday, August 25, 2011

Antibiotics in COPD exacerbation


The use of antibiotics in exacerbations of COPD is based on small placebo-controlled trials and large retrospective population studies. They found that antibiotics improve clinical outcomes in severe COPD exacerbations. There is little evident for the use of antibiotics in mild exacerbation.

A recent cochrane review on the topic concluded that "in COPD exacerbations with increased cough and sputum purulence antibiotics, regardless of choice, reduce the risk of short-term mortality by 77%, decrease the risk of treatment failure by 53% and the risk of sputum purulence by 44%; with a small increase in the risk of diarrhoea These results should be interpreted with caution due to the differences in patient selection, antibiotic choice, small number of included trials and lack of control for interventions that influence outcome, such as use of systemic corticosteroids and ventilatory support. Nevertheless, this review supports antibiotics for patients with COPD exacerbations with increased cough and sputum purulence who are moderately or severely ill".


Choice of antibiotics is an area where not a great deal of evidence exists. Most initial trials were with Amoxicillin, Doxycyclin and Septra. However, these antibiotics are no longer considered first-line for treatment of pathogens such as H.Flu and M. catarrhalis that maybe responsible for COPD exacerbations. When deciding on the antibiotic choice, risk factors such as older age (>65 years), comorbid conditions (especially cardiac disease), severe underlying COPD (defined as FEV1 <50 percent), frequent exacerbations (three or more per year), and antimicrobial therapy within the past three months should be taken into account.

The GOLD guidelines recommend antibiotic therapy for patients with:

1) Severe exacerbation requiring mechanical ventilation
2) With three cardinal symptoms of increased sputum purulence plus either increased dyspnea or increased sputum volume
(thought they don’t provide any guidance regarding the choice of antibiotics)

WITHDRAWN: Antibiotics for exacerbations of chronic obstructive pulmonary disease.
Ram FS, Rodriguez-Roisin R, Granados-Navarrete A, Garcia-Aymerich J, Barnes NC. Cochrane Database Syst Rev. 2011 Jan 19;(1):CD004403.


3 comments :

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