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>> night after night and for two, three, four months or whatever, the patient can't sleep, then it's time to go have another look. >> reporter: so if you can't sleep, this is a kind of wake-up call. don't just ask for a prescription. you need to look to see why you can't sleep. >> and short term, long term use, any conclusions? >> short term is fine. if you're having long term insomnia, it's like a mystery you have to solve. i put all kinds of information on abcnews.com about insomnia. really important to look at. >> could be your early warning system about something else. thank you, rich. and still ahead, robin roberts who was right there at the oscars. [ male announcer ] that. right there -- reminds you