Studies may conclude that sleep heat disease with mild sleep deprivation and disrupt hormones ghrelina and leptin.  These hormones regulate appetite, lack up sleep can also aid in colon cancer, breast cancer, heart disease and diabetes.  Medical study found that people who slept less than six ours a night were at an increased risk of death.  The common prescription to treating insomnia are thru drugs; such as, Ambien, Lunesta, and Sonata.  An over the counter drug melatonin is produced synthetically to mimic the natural melatonin producted by the body.

Source: Personal Health Advice