Study of Nitazoxanide in the Treatment of Clostridium Difficile Colitis

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT00417872
Recruitment Status : Completed
First Posted : January 4, 2007
Last Update Posted : January 4, 2007
Information provided by:
Romark Laboratories L.C.

January 3, 2007
January 4, 2007
January 4, 2007
January 2004
Not Provided
Clinical response (resolution of all symptoms present at baseline) recorded on day 8
Same as current
No Changes Posted
  • Time from first dose to passage of last unformed stool
  • Time from first dose to resolution of symptoms
  • Sustained clinical response (resolution of all symptoms present at baseline with no recurrence during follow-up)
  • C. difficile toxin enzyme immunoassay/culture results during hospitalization
Same as current
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Study of Nitazoxanide in the Treatment of Clostridium Difficile Colitis
Multicenter, Double Blind, Metronidazole Controlled, Dose Range Finding Study of Nitazoxanide in the Treatment of Clostridium Difficile Colitis
The primary objective is to demonstrate non-inferiority of nitazoxanide administered 500 mg b.i.d compared to metronidazole administered 250 mg q.i.d. in resolving symptoms of Clotridium difficile colitis after seven days of treatment. Secondary objectives are to provide information on the times from first dose to last unformed stool and resolution of symptoms of colitis, the sustained response rates for the different tratment groups and the effect of treatment on Clostridium difficile toxin enzyme immunoassay/culture results during hospitalization.
Not Provided
Phase 2
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double
Primary Purpose: Treatment
Clostridium Difficile
  • Drug: Nitazoxanide
  • Drug: Metronidazole
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*   Includes publications given by the data provider as well as publications identified by Identifier (NCT Number) in Medline.
Same as current
September 2005
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Inclusion Criteria:

  • Age ≥ 18 years.
  • In-patients with new onset of colitis evidenced by diarrhea (≥3 unformed stools within 24 hours), with one or more of the following: abdominal pain or cramps; peripheral leukocytosis, otherwise unexplained; or fever, otherwise unexplained.
  • C. difficile toxin A or B detected in a stool specimen obtained within 7 days before enrollment by enzyme immunoassay.
  • Patients able to take oral medications.
  • Patients willing to avoid the following medications during the study: oral and intravenous metronidazole, oral vancomycin, anti-peristaltic drugs, opiates, Saccharomyces cerevisiae (baker’s yeast), Lactobacillus GC, cholestyramine or colestipol. [Patients on opiates may be included in the study as long as they were taking opiates prior to enrollment and the dose is not increased during the study].
  • Patients willing to abstain from alcohol during the 10-day treatment duration and for two days following treatment.

Exclusion Criteria:

  • Patients with other known causes of diarrhea or colitis (e.g., Shigella, Salmonella, Cryptosporidium parvum, Giardia lamblia, Entamoeba histolytica, inflammatory bowel disease, irritable bowel syndrome, advanced AIDS or chemotherapy for malignancy).
  • Use within 1 week of enrollment of any drug or therapy with anti-C. difficile activity such as oral or intravenous metronidazole and oral vancomycin. [Patients that have taken up to 2 doses of metronidazole or vancomycin can be included in the study].
  • Females of child bearing age who are either pregnant, breast-feeding or not using birth control. A double barrier method, oral birth control pills administered for at least 2 monthly cycles prior to study drug administration, an IUD, or medroxyprogesterone acetate administered intramuscularly for a minimum of one month prior to study drug administration are acceptable methods of birth control for inclusion into the study. In addition, female patients of child-bearing potential should have a baseline pregnancy test and should agree to continue an acceptable method of birth control for the duration of the study (including follow-up).
  • Patients taking phenytoin, celecoxib, and/or losartan. [Patients taking Coumadin® (warfarin) may be included as long the prothrombin time is monitored at least twice weekly during the first 2 weeks of the study and at least weekly thereafter].
  • Patients with severe renal or hepatic impairment.
  • Patients who are clinically unstable (e.g., patients with signs of toxic megacolon or imminent perforation).
  • Serious systemic disorders incompatible with the study.
  • History of hypersensitivity to metronidazole.
Sexes Eligible for Study: All
18 Years and older   (Adult, Senior)
Contact information is only displayed when the study is recruiting subjects
United States
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Romark Laboratories L.C.
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Principal Investigator: Ian M Baird, M.D. Remington-Davis Inc., and Riverside Infection Consultants, Inc.
Principal Investigator: Herbert L DuPont, M.D. CHI St. Luke's Health, Texas
Principal Investigator: Arvind K Gupta, M.D. Lehigh Valley Hospital
Principal Investigator: Robert S Jones, D.O. The Reading Hospital and Medical Center
Principal Investigator: Arnold L Lentnek, M.D. WellStar Infectious Diseases, Summit Surgical Specialists, and WellStar Kennestone Hospital
Principal Investigator: Daniel Musher, M.D. Houston Veterans Affairs Hospital
Principal Investigator: Fadi Saba, M.D. Bayfront Medical Center and Edward White Hospital
Romark Laboratories L.C.
October 2005

ICMJE     Data element required by the International Committee of Medical Journal Editors and the World Health Organization ICTRP