Transient and short-term insomnias lasting from days to weeks, are common during emotional distress.
Chronic insomnias last over several weeks  and are usually related to specific medical or psychiatric conditions [8,9]; the nocturia of prostatic hypertrophy is an example.
Insomnias may call also for the use of "sleeping pills.
5,24] Readily predictable insomnias also occur more frequently (eg, before hospitalizations or during a painful illness) [15,20]
The most common therapy for insomnias has been the benzodiazepines, especially those of short to intermediate half-life.
Phase III study to determine the efficacy of ramelteon in elderly patients with chronic insomnia (abstract).
Polysomnogaraphy and outpatient study to determine the efficacy of ramelteon in adults with chronic insomnia (abstract).
Phase III outpatient trial of ramelteon for the treatment of chronic insomnia in elderly patients (abstract).
Double-blind, placebo-controlled polysomnography and outpatient trial to evaluate the efficacy and safety of ramelteon in adult patients with chronic insomnia (abstract).
Double-blind, placebo-controlled outpatient clinical trial of ramelteon for the treatment of chronic insomnia in an elderly population (abstract).
Eszopiclone co-administered with fluoxetine in patients with insomnia coexisting with major depressive disorder.
Cognitive behavioral therapy for insomnia enhances depression outcome in patients with comorbid major depressive disorder and insomnia.
Behavioral insomnia therapy for fibromyalgia patients--A randomized clinical trial.
Pain, sleep and mood outcomes in chronic pain patients following cognitive behavioral therapy for insomnia.
Practice parameters for the nonpharmacologic treatment of chronic insomnia.