A Study of Letrazuril in the Treatment of AIDS-Related Diarrhea

• Status: Completed
• Trial end date: 1969-12-31
• Target enrollment: 0
• Participant gender: All

Summary

To determine the pharmacokinetic profile of single doses of letrazuril in patients with AIDS-related cryptosporidial diarrhea; to determine the dose proportionality of single escalating doses of letrazuril; to determine steady-state concentrations of letrazuril; to evaluate the safety and efficacy of escalating doses of letrazuril, compared with placebo, for patients with AIDS-related cryptosporidial diarrhea.

Letrazuril, the p-fluor analog of diclazuril, has been shown in an animal model to prevent infections by organisms closely related to the intracellular parasite Cryptosporidium. Reliable data are needed to show the effectiveness of letrazuril in treating AIDS-related cryptosporidial diarrhea.

• Phase: Phase 1
• Accepts Healthy Volunteers?: No

Details

• Lead Sponsor: National Institute of Allergy and Infectious Diseases (NIAID)
• Collaborator: Janssen Pharmaceuticals

Criteria

Inclusion Criteria

Concurrent Medication:

Allowed:

• Anti-diarrheal and antiemetic medications.

• Anti-HIV agents such as zidovudine, ddI, and ddC if dosing regimens were stable for at least 3 weeks prior to start of study drug.

Patients must have:

• AIDS.

• Chronic diarrhea with presence of Cryptosporidium oocysts in a stool specimen.

• CD4 count < 150/mm3 (not required if patient has had cryptosporidiosis for a minimum of 4 weeks).

• Life expectancy of at least 1 month.

Prior Medication:

Allowed:

• Anti-HIV agents such as zidovudine, ddI, and ddC if dosing regimens were stable for at least 3 weeks prior to start of study drug.

• Anti-diarrheal and antiemetic medications.

Exclusion Criteria

Co-existing Condition:

Patients with the following symptoms or conditions are excluded:

• Grade 4 hematologic toxicity or grade 3 other toxicity ( patients with grade 3 hepatic toxicity may be enrolled if abnormalities are considered to be caused by biliary cryptosporidiosis).

• Presence of other diarrhea-causing pathogens.

• Active (defined as newly diagnosed, progressive, or requiring therapeutic intervention) opportunistic infection that requires antimicrobial therapy (patients receiving maintenance or prophylactic antimicrobial therapy for opportunistic infection may be enrolled if the dosing regimen has been stable for at least 3 weeks).

• Evidence of cytomegalovirus retinitis or colitis.

Concurrent Medication:

Excluded:

• Ganciclovir, cancer chemotherapy, or interferon-alpha or other immunomodulating agents.

• Any investigational drug (drugs available under an FDA-authorized expanded access program will not be considered investigational).

Prior Medication:

Excluded:

• Any investigational drug within 1 month prior to start of study drug (drugs available under an FDA-authorized expanded access program will not be considered investigational).

• Ganciclovir, cancer chemotherapy, or interferon-alpha or other immunomodulating agents within 7 days prior to start of study drug.