What causes sleep disorder? (Full Details)

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People who work at night often experience sleep disorders because they cannot sleep when they start feeling drowsy. Their activities run contrary to their biological clocks.

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Certain drugs can interfere with sleep cycle. These may include antidepressants, blood pressure medication, and some over-the-counter cold medicines.

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About half of all adults over the age of 65 years experience some sort of sleep disorder. It is not clear if it is a normal part of aging or a result of medications that older people commonly use to treat various ailments that they are suffering from.

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Serious sleep disorders can be caused because of medical conditions such as chronic obstructive pulmonary disease, sleep-related gastroesophageal reflux, peptic ulcer, fibrositis syndrome, back problems, and neck problems.

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Any impairment in the brain such as central apnoea and neurodegenerative diseases such as Alzheimer's disease are also potential cause for sleep disorders.