The purpose of this study is to see if just 3 to 5 days of LEVAQUIN® 750 mg is as good as 5 days of ZITHROMAX® 250 mg or 10 days of AUGMENTIN® 875 mg in the treatment of acute bacterial exacerbation of chronic bronchitis (ABECB), and to see if there is a difference in side effects between the three drugs.

Ages Eligible for Study:  18 Years and above,  Genders Eligible for Study:  Both

Criteria

Inclusion Criteria (including but not limited to):

• History of chronic bronchitis
• Diagnosis of Type-1 or Type-2 acute bacterial exacerbation of chronic bronchitis (ABECB)
• If female patient: must be postmenopausal for at least 1 year, OR have hysterectomy, OR bilateral tubal ligation or otherwise incapable of pregnancy.

Exclusion Criteria (including but not limited to):

• Diagnosis of bronchial asthma
• Allergy or serious adverse reaction to any of the study medications or other quinolone or other penicillin or other macrolide
• Failed treatment of pneumonia or ABECB in past three months with any of the study medications or other quinolone or other penicillin or other macrolide
• Can not tolerate medication taken by mouth.