title: A randomized comparative study on the safety and efficacy of clarithromycin and erythromycin in treating community-acquired pneumonia.
abstract: BACKGROUND
  Clarithromycin, a new macrolide, has distinct microbiological and pharmacokinetic advantages compared with erythromycin. This study was designed to compare the safety and efficacy of clarithromycin and erythromycin in the treatment of community-acquired pneumonia.
  
  
  METHODS
  Forty adult patients, diagnosed with community-acquired pneumonia, were randomly arranged to received either clarithromycin 250 mg twice daily (20 patients) or erythromycin 500 mg four times daily (20 patients), over a period of 14 days each.
  
  
  RESULTS
  There were no statistically significant differences between the two groups in terms of clinical cure (65% for clarithromycin, 65% for erythromycin), clinical success (clinical cure and improvement: 95% for clarithromycin, 90% for erythromycin) and radiological response (95% for clarithromycin, 90% for erythromycin). However, adverse effects, mainly gastrointestinal, were significantly higher among patients treated with erythromycin than among patients treated with clarithromycion (p < 0.05).
  
  
  CONCLUSIONS
  These results demonstrate that clarithromycin 250 mg twice daily is at least as effective as erythromycin 500 mg four times daily for the treatment of community-acquired pneumonia, and is much better tolerated.
authors.affiliation: Department of Medicine, Shin Kong Wu Ho-Su Memorial Hospital, Taipei, Taiwan, R.O.C.
authors.forename: T N
authors.initials: TN
authors.lastname: Jang
authors.forename: C Y
authors.initials: CY
authors.lastname: Liu
authors.forename: F D
authors.initials: FD
authors.lastname: Wang
authors.forename: S P
authors.initials: SP
authors.lastname: Yang
authors.forename: C P
authors.initials: CP
authors.lastname: Fung
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D017291:Clarithromycin / Q000009:adverse effects / Q000627:therapeutic use*; D004917:Erythromycin / Q000009:adverse effects / Q000627:therapeutic use*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D018410:Pneumonia, Bacterial / Q000188:drug therapy*
chemical_list: D004917:Erythromycin; D017291:Clarithromycin