OTC
Mucolytic (catarrh and phlegm thinner)
Carbocisteine
Last reviewed April 2026
Who is this for?
What is this drug?
Carbocisteine is a mucolytic medicine — it works by making thick, sticky mucus (phlegm or catarrh) in your chest and airways thinner and easier to cough out.
What is it used for?
Catarrhchest congestionstubborn cough with thick phlegmbronchitischronic obstructive pulmonary disease (COPD)mucus buildup in the lungs
Available Over The Counter
Available at pharmacies without a prescription. Rules may vary by country.