Cough
"I get much better results from mucinex or a cough suppressant and decongestant at night. It&#039;s worth noting that some people are incapable of making enough of the enzyme CYP2D6 to break down the codeine for your body to use. I&#039;m pretty sure I&#039;m one of those people.  I have acute bronchitis. What&#039;s helped is warm showers and breathing in the steam through my mouth. I&#039;ve used mucinex,  alkazeltzer severe cold and flu,  and theraflu. They work when they feel like it.  The alkazeltzer knocks me out for the night. Sleeping propped up next to a humidifier helps too."