Over 19 million American adults aged 18 to 54 years (13.3% of this age group) suffer from anxiety disorders.1 Common sleep disturbances associated with anxiety disorders are sleeponset or sleep maintenance Insomnia. Additionally, some subjects develop sedative or hypnotic abuse, further complicating their sleep disturbances. Anxiety disorders are

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difficulty concentrating or “the mind going blank,” Irritability, muscle tension, and difficulty Initiating or maintaining sleep or restless unsatisfying sleep.7,13 Polysomnography shows nonspecific findings Inhibitors,research,lifescience,medical of increased sleep latency, reduced sleep efficiency, Increased amounts of stages 1 and 2 NREM sleep, reduced SWS, Increased frequency and duration of awakenings, normal or Increased REM sleep latency, and decreased REM sleep percentage.26,28 Positive correlations have Inhibitors,research,lifescience,medical been reported between anxiety ratings and number of awakenings, latency to stage 1 NREM sleep, and percentage of stage 2 NREM sleep.27 Panic disorder PD Is another anxiety disorder associated with sleep problems. Two million four hundred thousand American adults aged 18 to 54 years have PD1; the average age of onset Is In the late 20s.13 Women are affected two to three times more frequently than men, and the disorder tends to run in families.13 Adults with PD frequently have a history

of childhood separation Inhibitors,research,lifescience,medical anxiety disorder. PD Is characterized by discrete episodes of Intense fear or terror of dying, accompanied by dizziness, old choking, palpitations, trembling, chest pain or discomfort, and sweating. PD can be associated with secondary depressive symptoms, alcoholism, sedative or hypnotic abuse, and agoraphobia. Nocturnal panic (NP) episodes occur in 44% to 71% of PD patients and are associated with sudden awakening with the onset of typical panic symptoms.29,30 The subject is hyperaroused and has difficulty returning to sleep.30 Comparing patients with NP (n=51) to patients with PD without a history of NP (n=41), Craske et al reported no evidence of more severe psychopathology on measures of PD severity, comorbidity, or Interpersonal functioning, and only weak evidence for more sleep disturbance in patients with NP29 In addition to Insomnia, other sleep complaints may include sleep paralysis and hypnagogic hallucinations.