Regardless of the cause, excessive sleepiness "is becoming more of a legitimate complaint," both among patients and doctors, says David G. Davila, MD, a National Sleep Foundation spokesman and board member who practices sleep medicine in Little Rock, Ark. He sees men and women who can't muster enough alertness to finish mental tasks or who struggle to stay awake while driving -- and many who doze off in his waiting room.
Some try to cope with excessive sleepiness through caffeine or stimulants, he says. "They'll come in actually complaining of insomnia because they're at Starbucks too much, and they're piling on the caffeine too late in the day. They're really responding to sleepiness, but then they end up getting secondary insomnia related to the caffeine