title: Efficacy and safety of clarithromycin compared to cefixime as outpatient treatment of lower respiratory tract infections.
abstract: BACKGROUND
  Clarithromycin is a new acid-stable, 14-membered macrolide active against many of the organisms responsible for lower respiratory tract infections. It has been administered to over 5,000 patients worldwide and has been shown to be a safe and effective treatment for acute bacterial exacerbations of chronic bronchitis and bacterial pneumonia when given twice daily (250 to 500 mg). Cefixime is an amino-thiazolyl cephalosporin with an extended spectrum of antibacterial activity inhibiting beta-lactamase-producing respiratory pathogens. It has a long half-life, allowing once-daily administration.
  
  
  METHODS
  This randomized, double-blind multicenter study compared clarithromycin and cefixime as treatment for patients with community-acquired lower respiratory tract infections (n = 213). Patients had bacterial pneumonia (clarithromycin, 19 percent; cefixime, 21 percent) or acute bacterial exacerbation of chronic bronchitis or asthmatic bronchitis (clarithromycin, 81 percent; cefixime, 79 percent). Patients received 500 mg of clarithromycin twice daily (n = 103) or 400 mg of cefixime once daily (n = 110) for 7 to 14 days.
  
  
  RESULTS
  Clinical cure or improvement occurred in 86 percent of the clarithromycin-treated patients and 88 percent of the cefixime-treated patients. When only patients with identified infections with Haemophilus influenzae, Moraxella catarrhalis, or Streptococcus pneumoniae were considered, clinical success rates were 97 percent for clarithromycin and 96 percent for cefixime; the rate of bacteriologic eradication was 91 percent for clarithromycin and 90 percent for cefixime. Adverse events occurred in 29 percent of the clarithromycin-treated patients and 23 percent of the cefixime-treated patients.
  
  
  CONCLUSIONS
  This study demonstrates that clarithromycin and cefixime are effective treatments for pneumonia and acute bacterial exacerbations of bronchitis of mild to moderate severity caused by the most common infecting organisms.
authors.affiliation: Columbia University College of Physicians and Surgeons, New York.
authors.forename: H C
authors.initials: HC
authors.lastname: Neu
authors.forename: T W
authors.initials: TW
authors.lastname: Chick
mesh_terms: D000328:Adult; D000368:Aged; D000553:Ambulatory Care / Q000706:statistics & numerical data; D000704:Analysis of Variance; D000900:Anti-Bacterial Agents / Q000009:adverse effects* / Q000494:pharmacology / Q000627:therapeutic use*; D001419:Bacteria / Q000187:drug effects / Q000302:isolation & purification; D020682:Cefixime; D002439:Cefotaxime / Q000009:adverse effects / Q000031:analogs & derivatives* / Q000494:pharmacology / Q000627:therapeutic use; D017291:Clarithromycin / Q000009:adverse effects* / Q000494:pharmacology / Q000627:therapeutic use*; D017714:Community-Acquired Infections / Q000188:drug therapy / Q000453:epidemiology / Q000382:microbiology; D004311:Double-Blind Method; D005260:Female; D006801:Humans; D008297:Male; D008826:Microbial Sensitivity Tests; D008875:Middle Aged; D012141:Respiratory Tract Infections / Q000188:drug therapy* / Q000453:epidemiology / Q000382:microbiology; D014481:United States / Q000453:epidemiology
chemical_list: D000900:Anti-Bacterial Agents; D020682:Cefixime; D017291:Clarithromycin; D002439:Cefotaxime