The Journal of the American Board of Family Practice / American Board of Family Practice
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J Am Board Fam Pract · Mar 1993
Randomized Controlled Trial Comparative Study Clinical TrialClinical trial examining effectiveness of three cough syrups.
Cough is one of the most common symptoms of respiratory infections for which patients seek relief. This study was done to assess the effectiveness of three commonly prescribed cough syrups. ⋯ It appears that codeine, dextromethorphan, and guaifenesin are equally effective in relieving cough symptoms.