Doctor's Notes on Insomnia Medication Names and Side Effects
Insomnia is difficulty falling asleep, staying asleep or both that results in inadequate sleep; the problems are the signs and symptoms of insomnia. Transient insomnia lasts less than 3 weeks (usual is 1 week) while chronic insomnia lasts more than 6 months. Insomnia is the most common sleep complaint and is itself a symptom associated with variety of medical, psychiatric and sleep disorders.
There are many potential direct and associated causes of transient and chronic insomnia. For example, any short-term or chronic stress can trigger insomnia, mental health disorders like depression, anxiety, bipolar and others are associated with insomnia, older people (due to medical illnesses, social stressors) have a higher rate of insomnia, hormonal changes (more often in women), long distance travel (jet lag) and night shift workers are associated with an increased risk of insomnia. There are many other potential risk factors.
Kasper, D.L., et al., eds. Harrison's Principles of Internal Medicine, 19th Ed. United States: McGraw-Hill Education, 2015.