Comparison of Cefdinir and Cefdinir/Clavulanic Acid Combination in Adults

Inclusion Criteria: * The diagnosis of chronic bronchitis * The diagnosis of community-acquired pneumoniae * FEV1 value = 30-80% * The diagnosis of mild-severe acute exacerbation of chronic bronchitis (AECB) * Oxygen saturation \< 90% Exclusion Criteria: * Pregnancy or breastfeeding * Allergy against to penicillin or cephalosporins * Renal impairment * Active hepatic disease * Antibiotic use except study drugs * Immunosuppressive therapy before 6 months of study initiation * Use of probenecid like drugs