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Default 08-16-2004, 11:03 PM

Ask Dr. H | Cold-product ingredient DM may do little for coughs

By Mitchell Hecht

Knight Ridder News Service


Question: My friend told me that a study just published by Penn State showed Robitussin DM cough syrup to be no better than sugar syrup. Can you tell me more?

A: Actually, the study showed that dextromethorphan (DM), the active ingredient in over-the-counter cold products, was no better than placebo in improving nighttime cough, specifically in children.

What you might not know is that although DM has been sold for 50 years as the safer, nonaddictive cousin of codeine, the evidence that it works better than placebo is weak, at best. Most of the early studies were not properly designed against a placebo or they used an artificially induced cough. Four studies, two each in the 1960s and 1990s, showed that DM was superior to placebo, although the latter studies were performed by Procter and Gamble, maker of the Vicks line of cold and cough formulas. Four more studies, all done in the 1990s, showed DM was no better than placebo.

So why is DM used when its benefit is inconsistent? First of all, there's a 50-year history of its recommendation by doctors and textbooks. Secondly, there's lots of direct-to-consumer advertising for cough and cold products. Lastly, what else does a parent have available to safely relieve a child's cough?

I haven't found DM to be nearly as effective as codeine or hydrocodone-based cough syrups. But I wouldn't recommend those medications for use in children, unless a pediatrician OKs it. Still, over-the-counter cough syrups usually include guaifenesin to loosen thickened mucus. One reason I've found for failure is that not enough cough syrup is being used. Every four hours as needed means exactly that.

Of course, another reason why you may continue to cough is the possible need for an antibiotic. So if you're running a fever, coughing up green/brown/bloody sputum, or getting short of breath, it's important to see your doctor. Let's be sure it's a cold and not bacterial bronchitis or pneumonia.

If you're under a doctor's supervision, codeine or hydrocodone-based cough syrup may be more effective if you're still coughing or you're having pain with coughing. It may be sedating, but that can help you get a good night's sleep. For those over age 10 who simply can't tolerate codeine or hydrocodone, continue taking Robitussin DM every four hours as needed and ask your doctor to consider Tessalon Perles. They're tiny yellow pearllike pills swallowed with a tall glass of water to numb the nerves that control the cough reflex.

Link: http://www.philly.com/mld/philly/living/he.../9410977.htm?1c
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Infected Method Offline
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Default 08-16-2004, 11:05 PM

Gets better and better every day..

Quote:
So why is DM used when its benefit is inconsistent? First of all, there's a 50-year history of its recommendation by doctors and textbooks. Secondly, there's lots of direct-to-consumer advertising for cough and cold products. Lastly, what else does a parent have available to safely relieve a child's cough?
So.. if theres a 50 year recommendation, how does this study even .. I dont know the words to choose, but how the fuck is it a valid study if people in the past have 'recommended' it, isn't that proof at its least that maybe it DOES cure coughs and maybe this study was bogus? -.-


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Default 08-17-2004, 12:52 PM

they don't realize that getting a cold or cough is normal and antibiotics aren't the answer unless it is very serious.

they also don't realize that dextromethorphan at 9mg/kg is so fucking trippy.


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Default 08-17-2004, 11:11 PM

LOLOLOL

' LETS MAKE THEM THINK THAT DAMN NMDA ANTAGONIST IS JUST A GIMICK '
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Default 08-18-2004, 05:37 PM

Quote:
Originally posted by lucidistortions@Aug 17 2004, 07:11 PM
LOLOLOL

' LETS MAKE THEM THINK THAT DAMN NMDA ANTAGONIST IS JUST A GIMICK '
One can make an other believe anything they want. So many people don't take advantage of good knowledge of a certain field.


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Default 08-19-2004, 12:14 AM

omg that study is so fucking retarded


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Default 08-19-2004, 05:59 PM

lololololol. Anyways iv known that for a long time, Iv caughed on heavy doses here and there. I could have told you that.


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Default 08-21-2004, 04:30 AM

Quote:
Originally posted by _Swey_@Aug 19 2004, 01:59 PM
lololololol. Anyways iv known that for a long time, Iv caughed on heavy doses here and there. I could have told you that.
It's isn't an anititussive at high doses. After 30mg or so it loses it's antitussive properties and increases it's scientific purposes.


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