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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Management of insomnia in patients with chronic obstructive pulmonary disease.

Chronic obstructive pulmonary disease (COPD) is a common medical disorder, which causes considerable morbidity and mortality. Given the chronic and symptomatic nature of the disease, the patient is often seen in the physician's office with complaints of dyspnea. However, more than 50% of COPD patients also have sleep complaints characterised by longer latency to falling asleep, more frequent arousals and awakenings, and/or generalised insomnia. Sleep disturbance tends to be more severe with advancing disease and substantially reduces the COPD patients' quality of life. In approaching the COPD patient who complains of insomnia it is important to take a complete sleep history. Having characterised the degree and duration of the problem, medical management of the underlying COPD must first optimise oxygen saturation while minimising the effects of many of the medications used for COPD. While aerosol therapies may be systemically absorbed and contribute to sleep disruption, anticholinergics, such as ipratropium bromide, are the least likely to do so and indeed have been shown to improve sleep quality in this population. Many of the traditional sedatives and hypnotics have been used in the COPD population including benzodiazepines, imidazopyridines, pyrazolopyrimidines and, less commonly, antidepressants and phenothiazines. Clinical trials support the role of numerous agents in treating insomnia in this population but do not always provide reassurance that these therapies can be used safely, particularly in the patient with severe COPD with hypercarbia. Benzodiazepines are among the most commonly employed agents, but case reports and series continue to describe adverse pulmonary events. Although the newer pyridine derivatives also have the potential to worsen pulmonary function, they appear less likely to do so. Data to date are limited with the tricyclic antidepressants and phenothiazines, although they appear to be very well tolerated from a respiratory point of view. Since sleep disturbances are often long-standing and associated with maladaptive behaviours towards sleep, cognitive/behavioural approaches are often useful and are more effective in the long-term than are hypnotics. When prescription of a sedative is to be made, extra caution is required for those patients at increased risk of adverse respiratory effects, such as those with advanced disease and hypercarbia in whom pharmacological therapy is often best avoided. Selection of the various options will depend upon the degree of underlying disease and the patient's specific complaints of insomnia. Finally, it is important to remember that while most hypnotics work in an acute setting, the long-term management will require an integrated approach.[1]


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