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Administration of concomitant antibiotics (CA) is a known risk factor for treatment failure in the treatment of CDI, as well as for recurrence of CDI. Recent data suggested that among patients receiving CA, fidaxomicin is superior to vancomycin. While these data are encouraging, many clinicians remain unclear on how to apply these data to patient care. Additionally, patients were excluded from the trials presented to the FDA if it was expected that they would require ≥ 7 days of CA. Therefore, the clinical question still remains of how to apply these data to the real world patient who requires a long course of CA and develops CDI while on therapy. We therefore propose an open label, comparative and prospective study of fidaxomicin 200 mg twice daily vs oral vancomycin 125 mg four times daily for the treatment of CDI among patients who are receiving a long course of CA.
We hypothesize that fidaxomicin will be superior to vancomycin with respect to clinical cure for patients with CDI.
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Inclusion criteria
Patients 18 years of age or older with >3 unformed stools/24 hours with positive stool test for C. difficile.
Patients receiving ≥ 1 high or medium risk antibiotic for treatment of an infection other than CDI, for an anticipated duration of ≥ 5 days from the time of enrollment.
High risk: carbapenems, 2nd-4th generation cephalosporins, fluoroquinolones, clindamycin, and beta-lactam/beta-lactamase inhibitor combinations
Medium risk: 1st generation cephalosporin, macrolides*, and aztreonam
Exclusion criteria
Patients with severe-complicated disease that would compromise oral therapy (hypotenstion or shock, ileus or bowel obstruction, megacolon).
Patients with an allergy to oral vancomycin or fidaxomicin.
Patients anticipated to receive metronidazole after enrollment.
Patients who already received oral vancomycin or metronidazole (either oral or intravenous) for > 24 hours within the preceding 72 hours at the time of enrollment.
Patients anticipated to receive adjunctive C. difficile therapy (rifaxamin, nitazoxanide, tigecycline) after enrollment.
Patients who are on laxatives before they are enrolled into the study, such as lactulose, if:
Patients who have had colostomy or ileostomy
Patients who will have colostomy or ileostomy after enrollment and before study ends
Patients who are or will be on long-term (>12 weeks) medium or high-risk antibiotics prophylaxis after enrollment
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144 participants in 2 patient groups
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Data sourced from clinicaltrials.gov
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