Journal
ANNALS OF PHARMACOTHERAPY
Volume 42, Issue 6, Pages 827-835Publisher
SAGE PUBLICATIONS INC
DOI: 10.1345/aph.1K675
Keywords
Clostridium difficile diarrhea; rifamycin
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OBJECTIVE: To review the existing data on use of the rifamycin class of antibiotics for Clostridium difficile-associated diarrhea (CDAD). DATA SOURCES: A literature search was performed using PubMed(1996-January 2008), abstracts from the International Conference on Antimicrobial Agents and Chemotherapy (September 2007), the Infectious Disease Society of America (October 2007), Salix Pharmaceuticals Web site (January 2008), ActivBiotics Web site (January 2008), Google Scholar, and searches of selected bibilographies using the terms rifamycin, ansamycins, rifampin, rifabutin, rifampicin, rifaximin, rifalazil, Clostridium difficile, C. difficile, and CDAD. STUDY SELECTION AND DATA EXTRACTION: In vivo and in vitro studies investigating the use of rifamycins for CDAD were selected, along with all clinical trials using rifamycins in patients with CDAD. DATA SYNTHESIS: Nine stuedies totaling 890 isolates were identified that investigated the in vitro suspceptibilty of rifampin (6 studies), rifaximin (3 studies), and rifalazil(2 studies). Rifamycins consistently displayed potent activity against tested strains, although strains with decreased suspectibility have been identified. Six published clinical studies involving 81 patients have investigated the use of rifamycins for the treatment of CDAD. These have generally been small studies, although intial positive clinical results have been rported on the use of rifamycins for recurren CDAD. CONCLUSIONS: Preliminary data subpport the use of rifamycins for treatment of CDAD. With the increased incidences and severity of CDAD, further investigation into this drug class as a treatment regimen for CDAD is warranted.
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