Americans spend hundreds of millions of dollars a year on cough syrup and it doesn't do a thing for us. According to the American College of Chest Physicians, it's a waste of money to purchase over-the-counter cough syrups or drops for both adults and children. The new guidelines are based on a review of studies dating back several decades. The conclusion is that there is no scientific evidence which exists that suppressants or expectorants (drugs used to thin out mucus) - both commonly found in cough syrup - relieve coughs due to colds.
Instead, the new recommendation is to use over-the-counter sedating antihistamines, such as dexbrompheniramine, plus a decongestant, such as pseudoephedrine, which appear to be effective in relieving coughs due to colds. The new guidelines and evidence review are published in this month's issue of the journal
Chest.
For persistent coughs you should always consult your doctor since this may be a sign of something more serious than a cold.
Source:
usatoday