And when sleeping pills aren't enough to help patients stay alert, a wakefulness drug called Provigil is already approved for excessive daytime sleepiness caused by narcolepsy, sleep apnea and shift-work sleep disorder--the exhaustion brought on in some people by working the night shift.

FORBES: Sleep On Demand

If your dentist suspects a significant psychological component to your teeth grinding or a sleep-related disorder, you may be referred to a therapist, counselor or sleep specialist.

CNN: Bruxism/teeth grinding

One woman told CNN affiliate WQAD last year that she had a sleep-texting disorder.

CNN: STORY HIGHLIGHTS

Overweight people often have sleep problems -- most notably sleep apnea, a breathing disorder that causes frequent awakenings -- but it's not clear if they're overweight because of their sleep problems, or if their sleep problems result from being overweight.

CNN: Sleep deprivation spurs hunger

Vanda Pharmaceuticals said yesterday it is testing its melatonin-stimulating drug tasilmelteon in something called Non-24-Hour Sleep Wake Disorder.

FORBES: Helping Blind Patients To Sleep

Dr Adrian Williams, director of Sleep Disorder Centre at of Lane-Fox Unit, St Thomas's Hospital London said the new study is significant and could provide a better alternative to current treatments, which are mostly amphetamine based.

BBC: NEWS | Health | Brain chemical helps narcolepsy

The French scientists looked at 163 non-drinkers who had fatty livers - where fat deposits build up in the organ, potentially leading to formation of fibrous tissue and then to cirrhosis or even liver cancer - to see how many of them had the sleep disorder.

BBC: NEWS | Health | Sleep disorder liver disease link

By some estimates, 70 million Americans have some sort of sleep disorder, and right now many take only the occasional over-the-counter sleep aids.

FORBES: Sleep On Demand