The bottom line is, when you look at the well-done scientific studies, there were very few showing that any of the cough and cold products that we often buy are in fact effective for the acute cough from the common cold. We're not saying there's no role for any of these products but, for the common cold, there are very few good studies showing that any of these drugs do work.  -   Dr. Dicpinigaitis     Quotes
The bottom line is, when you look at the well-done scientific studies, there were very few showing that any of the cough and cold products that we often buy are in fact effective for the acute cough from the common cold. We're not saying there's no role for any of these products but, for the common cold, there are very few good studies showing that any of these drugs do work. Dr. Dicpinigaitis