Question: Please explain how
a cough suppressant can also act as an expectorant. If you're suppressing
the mucus that makes you cough, how can you also expectorate it? Doesn't
one action negate the other? Leslee
Answer: Dear Leslee,
Cough suppressants act on the
part of the brain that controls the cough reflex. They only relieve
dry, coughs and are not meant to treat coughs that bring up mucus.
Cough suppressants that contain
also a expectorant do in fact cancel each other's effects, as the
suppressant does not allow the body to cough up the mucus that has
bee loosen up by the expectorant.