A Study of Nitazoxanide in Patients With AIDS and Diarrhea Caused by Cryptosporidium

This study has been completed.
Sponsor:
Information provided by (Responsible Party):
National Institute of Allergy and Infectious Diseases (NIAID)
ClinicalTrials.gov Identifier:
NCT00001081
First received: November 2, 1999
Last updated: February 14, 2012
Last verified: February 2012
  Purpose

To determine the frequency of complete, marked, and partial clinical responses in patients with cryptosporidiosis treated with 6 weeks of NTZ versus 21 days of placebo. To determine the safety of NTZ in subjects with cryptosporidiosis.

There is no proven therapy for cryptosporidiosis in persons with AIDS. Nitazoxanide appears to be a good candidate drug for further evaluation because of its effectiveness in preclinical models, the data from early clinical trials and its safety profile. Cooperation between clinical researchers and basic scientists in clinical trials of agents for HIV infection and its complications is a high priority for the ACTG, the NIAID, and the NIH. Thus, it is important to design a clinical trial of NTZ that includes cooperation with basic scientists.


Condition Intervention Phase
Cryptosporidiosis
HIV Infections
Drug: Nitazoxanide
Phase 2

Study Type: Interventional
Study Design: Endpoint Classification: Safety Study
Intervention Model: Parallel Assignment
Primary Purpose: Treatment
Official Title: A Phase II/III Placebo-Controlled Study of Nitazoxanide (NTZ) For Persons With AIDS and Cryptosporidiosis

Resource links provided by NLM:


Further study details as provided by National Institute of Allergy and Infectious Diseases (NIAID):

Estimated Enrollment: 60
Study Completion Date: September 1998
Detailed Description:

There is no proven therapy for cryptosporidiosis in persons with AIDS. Nitazoxanide appears to be a good candidate drug for further evaluation because of its effectiveness in preclinical models, the data from early clinical trials and its safety profile. Cooperation between clinical researchers and basic scientists in clinical trials of agents for HIV infection and its complications is a high priority for the ACTG, the NIAID, and the NIH. Thus, it is important to design a clinical trial of NTZ that includes cooperation with basic scientists.

Patients will be randomized to the active drug or placebo in a 2:1 ratio. Patients will be stratified by presence or absence of dual infection with microsporidiosis and screening CD4+ count (<= 50/mm3, > 50/mm3).

Days 1 - 21, Arm I will receive oral NTZ and Arm II will receive NTZ placebo po bid (blinded). With the approval of the protocol chair, patients may switch to open-label NTZ after two weeks of blinded therapy if there is a clinical worsening of diarrhea due to cryptosporidiosis accompanied by either weight loss >= 5% or the requirement for intravenous fluids to maintain body weight and/or intravascular volume despite the use of appropriate antidiarrheal agents.

Days 22 - 42, Arm I and Arm II will receive oral NTZ (open-label). Days 43 - 63, Arm I will begin the maintenance phase and Arm II will receive oral NTZ (open-label).

On Day 63 Arm II will start the maintenance phase. In maintenance phase patients will be randomized to 1 of 2 doses of NTZ 24 weeks.

Patients who are not complete or marked responders at Day 42 (Arm I) or Day 63 (Arm II) may receive a higher dose of NTZ for an additional three weeks. Patients who have a complete or marked response at the higher dose may initiate maintenance therapy. Patients who continue to have only a partial response or who fail to respond will discontinue therapy.

  Eligibility

Ages Eligible for Study:   13 Years and older
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   No
Criteria

Inclusion Criteria

Patients must have:

  • Documented HIV infection.
  • Intestinal cryptosporidiosis.
  • Willingness to undergo a 1 week washout phase of all anticryptosporidial medications and stabilization on a protocol directed, antidiarrheal regimen.
  • Greater than or equal to 4 stools per day, on average, for a minimum of 21 out of 28 days prior to study entry, secondary to cryptosporidiosis.

AS PER AMENDMENT 2/10/97:

  • Four or more stools per day, on average, during the 5-day screening period prior to baseline.

Exclusion Criteria

Co-existing Condition:

Patients with the following symptoms and conditions are excluded:

  • Inability to tolerate oral medications.
  • Life expectancy less than 3 months in the opinion of the investigator.
  • Active CMV colitis, C. difficile colitis, giardiasis, salmonellosis, shigellosis, campylobacteriosis, inflammatory bowel disease, diarrhea secondary to another documented intestinal pathogen, or active or uncontrolled MAC disease, defined as symptomatic MAC disease and/or a patient who is not on appropriate anti-MAC therapy in the presence of MAC disease.

NOTE:

  • Patients who have been treated for MAC disease for at least 4 weeks and have resolved their symptoms may be enrolled. Patients dually infected with microsporidiosis may be randomized to the study but will not count toward the sample size.

AS PER AMENDMENT 2/10/97:

  • Failure to record a minimum of four days of information on the use of antidiarrheal medication and the frequency of bowel movements in the daily diary during the screening period.
  • Allergy to corn or corn products.

Concurrent Medication:

Excluded:

  • Need for continuing use of any medications with putative anticryptosporidial activity, including paromomycin, azithromycin, clarithromycin, spiramycin, bovine colostrum, monoclonal anticryptosporidial antibody preparations, letrazuril, atovaquone, diclazuril, octreotide and albendazole (prohibited during the acute treatment phase for patients dually infected with microsporidiosis)..

NOTE:

  • Patients who develop cryptosporidiosis while taking azithromycin or clarithromycin may be enrolled as long as they have been taking those medications for at least four weeks and remain on a stable dosage.
  • All antidiarrheals that are not part of the protocol directed Antidiarrheal Stabilization Regimen.
  • The addition of any new antiretroviral agent or immunomodulator therapy the first 63 days on the study.

Prior Medication:

Excluded:

  • Treatment at any time prior with nitazoxanide.
  • Addition of any new antiretroviral or increase in the dosage or current antiretrovirals within 4 weeks to study entry.
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its ClinicalTrials.gov identifier: NCT00001081

Locations
United States, Illinois
Cook County Hosp. CORE Ctr.
Chicago, Illinois, United States, 60612
Sponsors and Collaborators
Investigators
Study Chair: Fichtenbaum C
Study Chair: Soave R
  More Information

No publications provided

Responsible Party: National Institute of Allergy and Infectious Diseases (NIAID)
ClinicalTrials.gov Identifier: NCT00001081     History of Changes
Other Study ID Numbers: ACTG 336, 10690
Study First Received: November 2, 1999
Last Updated: February 14, 2012
Health Authority: United States: Federal Government

Keywords provided by National Institute of Allergy and Infectious Diseases (NIAID):
AIDS-Related Opportunistic Infections
Cryptosporidiosis
Antiprotozoal Agents
nitazoxanide

Additional relevant MeSH terms:
Infection
HIV Infections
Acquired Immunodeficiency Syndrome
Cryptosporidiosis
Lentivirus Infections
Retroviridae Infections
RNA Virus Infections
Virus Diseases
Sexually Transmitted Diseases, Viral
Sexually Transmitted Diseases
Immunologic Deficiency Syndromes
Immune System Diseases
Slow Virus Diseases
Intestinal Diseases, Parasitic
Parasitic Diseases
Protozoan Infections, Animal
Parasitic Diseases, Animal
Coccidiosis
Protozoan Infections
Intestinal Diseases
Gastrointestinal Diseases
Digestive System Diseases
Nitazoxanide
Antiparasitic Agents
Anti-Infective Agents
Therapeutic Uses
Pharmacologic Actions

ClinicalTrials.gov processed this record on September 16, 2014