What Caused Whitney Houston's Death?

Dr. Richard Besser discusses the pop superstar's death.
1:39 | 02/13/12

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Transcript for What Caused Whitney Houston's Death?
Want to -- -- -- and our chief health and medical editor and you know we're gonna wait several weeks now for the toxicology reports some reports that. There were prescription drug xanax sedatives like Valium Reza -- by the bedside -- -- toxicology reports actually show. You they're going to be looking for number of things one is for alcohol and then they'll be looking for each of those drugs in her in her system. Each of those drugs on their throne has side effects and common sided picture things -- -- lethargy or decreased desire to breathe. But here's the key point when you combine those drugs this side effects get magnified. So what -- one drug may have them a minor side effect could put these together. He can be deadly -- that it would take overwhelming amounts of any single one of these dresses do real -- exactly any one of these drugs alone the side effects are are are not that great but you combine them. And it's an exponential increase in aside especially -- -- combine them with alcohol that's right that's -- -- -- Well you know we keep hearing more and more about the problems the prescription drugs they've seen some. Of your colleagues describe this as an epidemic of problems so when you -- big problems is that you'll have multiple doctors' groups prescribing medications. So one doctor may give someone a sleeping -- Another doctor may give somebody something for anxiety. Well the drugs are very similar and if one doctor doesn't know what the others doing. You can get at a situation where you literally have a pharmacy in in your own medicine cabinet and that can be deadly -- your original -- combination is what could be deadly combination can be deadly. Accidental drowning in some in this -- Very very uncommon it's something you see -- young children and the elderly you've got to look here for something to contribute to that -- paid actress best thanks very much.

This transcript has been automatically generated and may not be 100% accurate.

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