Elderly and adults above 18 years: 300 mg (1 cap), 2-3 times a day.
Maximum dose should not exceed 900 mg/day.
Mild to moderate hepatic impairment: should not exceed 300 mg/day.
Note: Duration of treatment for acute exacerbations of chronic bronchitis should not exceed 10 days. The capsules must be swallowed whole with a glass of water.