Over-the-counter ... acute cough. Fifteen trials involving 2166 patients met the criteria. There were only a small number of studies (range, 1-5) for each of 6 categories: cough suppressants ...

you will find several over-the-counter (OTC) cough suppressants that contain the drugs dextromethorpan or diphenhydramine. For more severe coughs, your healthcare provider may prescribe a ...

and some are sold behind-the-counter. Making sense of it all can be daunting. One of the most confusing things about cough medicines is understanding the difference between cough suppressants and ...