This study compared the clinical efficacy and safety of azithromycin with that of amoxicillin-clavulanic acid, in patients between the ages of 35 and 75 years, presenting with an exacerbation of chronic bronchitis.

Inclusion Criteria:

Inclusion Criteria:

• Outpatients presenting with an exacerbation of chronic bronchitis including: chronic bronchitis with obstructive respiratory disorders documented by a forced expiratory volume of below 80% and higher than 35% of the theoretical value, within the previous 12 months; and thought to be of infectious origin

Exclusion Criteria:

Exclusion Criteria:

• Patient not presenting with the associated signs of an exacerbation
• Patient presenting with clinical signs suggestive of pneumonopathy at inclusion
• Patient requiring hospitalisation in intensive care