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Woods' Peppermint Antitussive Syrup for nonproductive cough is appropriate for the treatment of nonproductive cough accompanied by allergy, because it contains the combination of antitussive and antihistamine, dextromethorphan HBr and diphenhydramine HCl, respectively.
Dextromethorphan as an antitussive works by suppressing the cough central and by increasing the threshold of cough stimulation in the central nervous system.
