expectoration
"When I came down with pneumonia while living in Israel, acetylcysteine (brand name Siran) made all of the difference.  The medicine came as effervescent tablets with a lemon flavoring taken with water four times a day.  Within 48 hours I could feel a world of difference as I started to purge all of the fluid and congestion from my lungs.  Siran is one of the most effective medicines for expectoration I have ever used."