Background: COPD is a progressive illness and in the later stages, exacerbations may lead to ventilatory failure. The combination of hypoxia and hypercapnia can lead to coma and death. Correction of these blood gas abnormalities is a medical emergency. Doxapram is a respiratory stimulant used to stimulate breathing in this setting.
Objectives: The objective of this review was to assess the effects of doxapram on gas exchange and clinical outcomes in people with ventilatory failure due to acute exacerbations of chronic obstructive pulmonary disease.
Search strategy: We searched the Cochrane Airways Group trials register and reference lists of articles. We also contacted experts in the field, study authors and drug companies.
Selection criteria: Randomised trials comparing doxapram with other treatments or placebo in people with ventilatory failure due to exacerbations of chronic obstructive pulmonary disease.
Data collection and analysis: One reviewer assessed trial quality and extracted data.
Main results: Three trials involving 127 people were included. The trials were of variable quality. Doxapram was marginally superior to placebo in preventing blood gas deterioration (odds ratio 0.38, 95% confidence interval 0.14 to 1.02). In one small study, of 17 patients, doxapram and non-invasive ventilation appeared equally effective in terms of blood gases changes, although there were slightly more deaths with doxapram (odds ratio 11.34, 95% confidence interval 1.00 to 128.03).
Reviewer's conclusions: Doxapram may improve blood gas exchange in the short term, but newer techniques such as non-invasive ventilation may be more effective.