A Study to Evaluate the Use of Nitazoxanide to Treat Cryptosporidiosis
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.
ClinicalTrials.gov Identifier: NCT00002158
Recruitment Status : Unknown
Verified July 2007 by NIH AIDS Clinical Trials Information Service. Recruitment status was: Active, not recruiting
The purpose of this study is to see if nitazoxanide (NTZ) can be used to treat AIDS patients suffering from cryptosporidiosis (diarrhea caused by the parasite Cryptosporidium).
Condition or disease
Patients receive oral nitazoxanide daily for 14 days, after which those with complete clinical and parasitologic response discontinue treatment. Non-responders and partial responders may continue therapy for an additional 14 days at the discretion of the physician. Non-responders who show signs of improvement or who have partial response after 28 days and those who relapse following complete response may continue therapy for an additional month, up to 60 days total. [AS PER AMENDMENT 10/30/96: Patients receive a daily treatment for 4 weeks, with subsequent dose escalation in the absence of drug-related toxicity. Patients who exhibit complete response after 2 months may continue at a maintenance dose. Patients enrolled after October 15, 1996 are randomized to 1 of 2 doses, with subsequent escalations made in the absence of toxicity. Complete responders may continue therapy at a maintenance dose and duration determined by the investigator. Non-responders after 6 months of therapy have treatment discontinued.] [AS PER AMENDMENT 8/5/97: All patients are evaluated at Weeks 1, 2, 4, and monthly thereafter.] [AS PER AMENDMENT 8/17/99: New patients start therapy on a different dosage of nitazoxanide. Those who do not respond after 4 weeks of therapy will escalate to a higher dosage. Patients who show a complete response at 2 consecutive visits (2 weeks apart) discontinue nitazoxanide therapy and go to follow-up.] [AS PER AMENDMENT 2/3/00: The Week 1 clinical evaluation is deleted from the study procedures.]
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, Learn About Clinical Studies.
Layout table for eligibility information
Ages Eligible for Study:
3 Years to 65 Years (Child, Adult, Older Adult)
Sexes Eligible for Study:
Accepts Healthy Volunteers:
Patients may be eligible for this study if they:
Are 3 to 65 years old (need consent of parent or guardian if under 18).
Have a CD4 count less than or equal to 200 cells/mm3. (Note: Patients with a CD4 count greater than 200 cells/mm3 but who have had cryptosporidiosis for at least 4 weeks may be eligible for this study.)
Test positive for the parasite Cryptosporidium and have severe diarrhea (at least 4 bowel movements per day) for at least 2 weeks.
Have received treatment for cryptosporidiosis but have become reinfected after treatment.
Agree to practice abstinence or use effective methods of birth control (such as a condom) before and during the study.
Patients will not be eligible for this study if they: