Fidaxomicin versus vancomycin for Clostridium difficile infection

Thomas J. Louie, Mark A. Miller, Kathleen M. Mullane, Karl Weiss, Arnold Lentnek, Yoav Golan, Sherwood Gorbach, Pamela Sears, Youe Kong Shue

Research output: Contribution to journalArticlepeer-review

1331 Scopus citations

Abstract

Background: Clostridium difficile infection is a serious diarrheal illness associated with substantial morbidity and mortality. Patients generally have a response to oral vancomycin or metronidazole; however, the rate of recurrence is high. This phase 3 clinical trial compared the efficacy and safety of fidaxomicin with those of vancomycin in treating C. difficile infection. Methods: Adults with acute symptoms of C. difficile infection and a positive result on a stool toxin test were eligible for study entry. We randomly assigned patients to receive fidaxomicin (200 mg twice daily) or vancomycin (125 mg four times daily) orally for 10 days. The primary end point was clinical cure (resolution of symptoms and no need for further therapy for C. difficile infection as of the second day after the end of the course of therapy). The secondary end points were recurrence of C. difficile infection (diarrhea and a positive result on a stool toxin test within 4 weeks after treatment) and global cure (i.e., cure with no recurrence). Results: A total of 629 patients were enrolled, of whom 548 (87.1%) could be evaluated for the per-protocol analysis. The rates of clinical cure with fidaxomicin were noninferior to those with vancomycin in both the modified intention-to-treat analysis (88.2% with fidaxomicin and 85.8% with vancomycin) and the per-protocol analysis (92.1% and 89.8%, respectively). Significantly fewer patients in the fidaxomicin group than in the vancomycin group had a recurrence of the infection, in both the modified intention-to-treat analysis (15.4% vs. 25.3%, P = 0.005) and the per-protocol analysis (13.3% vs. 24.0%, P = 0.004). The lower rate of recurrence was seen in patients with non-North American Pulsed Field type 1 strains. The adverse-event profile was similar for the two therapies. Conclusions: The rates of clinical cure after treatment with fidaxomicin were noninferior to those after treatment with vancomycin. Fidaxomicin was associated with a significantly lower rate of recurrence of C. difficile infection associated with non-North American Pulsed Field type 1 strains. (Funded by Optimer Pharmaceuticals; ClinicalTrials.gov number, NCT00314951.)

Original languageEnglish
Pages (from-to)422-431
Number of pages10
JournalNew England Journal of Medicine
Volume364
Issue number5
DOIs
StatePublished - 3 Feb 2011
Externally publishedYes

ASJC Scopus subject areas

  • General Medicine

Fingerprint

Dive into the research topics of 'Fidaxomicin versus vancomycin for Clostridium difficile infection'. Together they form a unique fingerprint.

Cite this