A Study of Rifabutin, Used Alone or With Ethambutol in the Prevention of Mycobacterium Avium Complex (MAC) Bacteremia in Patients With AIDS

June 23, 2005 updated by: Pharmacia

An Open-Label Randomized Pharmacokinetic/Pharmacodynamic Study of Mycobutin (Rifabutin) or Rifabutin in Combination With Myambutol (Ethambutol) for Prophylaxis of Mycobacterium Avium Complex (MAC) Bacteremia in AIDS Patients With CD4 Counts <= 100 Cells/mm3

To optimize Mycobacterium avium Complex (MAC) prophylaxis in AIDS patients by measuring serum rifabutin levels and adjusting the dose accordingly. To combine rifabutin with ethambutol to examine the effect of combination therapy in preventing or delaying the incidence of MAC bacteremia in this patient population.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

Patients are randomized to receive oral rifabutin alone or rifabutin/ethambutol daily for 12 months, with possible continuation of medicine lifelong. Doses will be adjusted to maintain minimum blood levels of the drugs.

Study Type

Interventional

Enrollment

200

Phase

  • Phase 4

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • United States
    • California
      • Sacramento, California, United States, 95817
        • Univ of California - Davis Med Ctr / CARES

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

18 years and older (ADULT, OLDER_ADULT)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria

Concurrent Medication:

Required:

  • AZT, d4T, ddI, or ddC.
  • Antipneumocystis prophylaxis.

Allowed:

  • Short course (< 14 days) of ciprofloxacin for acute infections.

Patients must have:

  • AIDS.
  • CD4 count <= 100 cells/mm3.
  • NO prior or current MAC infection.

Prior Medication:

Required:

  • Antipneumocystis prophylaxis for at least 4 weeks prior to study entry.

Allowed:

  • Prior rifabutin.
  • Prior ethambutol.
  • Prior clarithromycin.

Exclusion Criteria

Co-existing Condition:

Patients with the following symptoms or conditions are excluded:

  • Positive tuberculin skin test (PPD > 5 mm).
  • Active M. tuberculosis.
  • Perceived as unreliable or unavailable for frequent monitoring.

Concurrent Medication:

Excluded:

  • Other antiretrovirals not specifically allowed.
  • All investigational drugs.
  • Other antimycobacterial therapy, such as clarithromycin, azithromycin, rifampin, clofazimine, amikacin, streptomycin, isoniazid, cycloserine, ethionamide, and ciprofloxacin (>= 14 days).

Patients with the following prior conditions are excluded:

Known hypersensitivity to rifabutin, rifampin, or other rifamycins and/or ethambutol.

Prior Medication:

Excluded within 4 weeks prior to study entry:

  • Rifampin.
  • Isoniazid.
  • Clofazimine.
  • Cycloserine.
  • Ethionamide.
  • Amikacin.
  • Ciprofloxacin.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: TREATMENT
  • Interventional Model: PARALLEL

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Pharmacia

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Registration Dates

First Submitted

November 2, 1999

First Submitted That Met QC Criteria

August 30, 2001

First Posted (ESTIMATE)

August 31, 2001

Study Record Updates

Last Update Posted (ESTIMATE)

June 24, 2005

Last Update Submitted That Met QC Criteria

June 23, 2005

Last Verified

June 1, 1997

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 048E
  • CS 087287-000

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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