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Study Shows Antitussive Efficacy For Diphenhydramine, Less For DXM

This article was originally published in The Tan Sheet

Executive Summary

Diphenhydramine, a common antihistamine in cough/cold OTCs, proves more effective in suppressing cough than the common antitussive dextromethorphan, researchers say. Diphenhydramine is in FDA’s antitussive OTC monograph, but marketers are criticized for not demonstrating its and other cough/cold ingredients’ efficacy in trials.

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