Carbocysteine
Carbocysteine is a mucolytic agent used to treat respiratory conditions characterized by excessive or abnormally thick mucus. It works by breaking down the chemical bonds in mucus, reducing its viscosity and making it easier to clear from the airways. This medication is commonly prescribed for patients with chronic respiratory conditions such as bronchitis, COPD, and sinusitis.
Carbocysteine is a mucolytic medication that thins and loosens thick mucus to help relieve respiratory congestion and improve breathing.
Key facts at a glance
- ATC
- R05CB03
- RxNorm
- 2023
- Generic
- Carbocysteine
- Class
- atc-r05
- Brands
- Availnex
- Availability
- rx
- Lactation
- unknown
- Routes
- oral
- Forms
- capsule, solution, tablet
- Regions
- US, EU, CN, JP
- Monitoring
- —
This page is for informational purposes only.
Do not use this information to diagnose yourself or to replace a physician's advice. Always consult a qualified healthcare provider before starting, stopping, or changing any medication. If you believe you are experiencing a medical emergency, call your local emergency number immediately.
Carbocysteine is used to treat conditions involving excessive or viscous respiratory secretions, including chronic bronchitis, chronic obstructive pulmonary disease (COPD), sinusitis, and otitis media (middle ear infections). It may also be used for cystic fibrosis and bronchiectasis when excessive mucus production is a concern.
Carbocysteine is a mucolytic agent that works by disrupting the disulfide bonds in mucoprotein molecules in mucus. This action reduces the viscosity and elasticity of bronchial secretions, making them thinner and easier to expectorate. By facilitating mucus clearance, it helps improve respiratory function and reduces coughing.
Carbocysteine is typically taken orally in syrup or capsule form. Common side effects may include gastrointestinal disturbances such as nausea or diarrhea. It should be used with caution in patients with a history of gastric ulcers. Patients should stay well hydrated while taking this medication to help loosen mucus. Always follow your healthcare provider's instructions regarding dosage and duration of treatment.
Official drug label
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This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 25, 2026. · Read our editorial policy