Codeine. Codeine was once viewed as the gold standard in cough suppressants. Some recent placebo-controlled trials have found however that it may be no better than placebo.
"In a 2002 study with mice, a passionflower leaf extract was shown to be comparable to the cough suppressant action of codeine.14 Passionflower is widely employed by. produces less constipation compared to codeine. cough_suppressants.txt · Last modified: 2009/11/20 16:27 by cclarks You May Also Like. Over the Counter Cough Suppressant for Dogs. Dogs cough, just like humans. And, just like humans, chronic coughing due to viruses like kennel cough. Cough Suppressant - NaturalNews NaturalPedia cough_suppressants [TUSOM | Pharmwiki] - Tulane University - New.
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