Viral Upper Respiratory Infections (Colds and Influenza) and Expectorants
Expectorants can help deal with the mucus congestion and related symptoms associated with the cold and flu. The same effect can usually be obtained by breathing wet air, either as a cold mist vaporizer or steamy shower.
Guaifenesin is a common expectorant.
Effect of Expectorants on Viral Upper Respiratory Infections (Colds and Influenza)
An expectorant decreases the thickness of respiratory secretions (such as mucus) so that they can more easily be coughed up or blown out.
Side Effects and Warnings
Possible side effects include: