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A Three-Arm Comparative Trial for the Treatment of MAC Bacteremia in AIDS: A Clarithromycin/Ethambutol Regimen Containing Rifabutin (450 Mg) or Rifabutin (300 Mg) or Placebo

This study has been completed.
Information provided by:
NIH AIDS Clinical Trials Information Service Identifier:
First received: November 2, 1999
Last updated: June 23, 2005
Last verified: June 1999
To compare the efficacy of clarithromycin/ethambutol with placebo or with rifabutin at two different doses in reducing colony-forming units (CFUs) by 2 or more logarithms in patients with Mycobacterium avium Complex bacteremia and maintaining this response until 16 weeks post-randomization. To assess survival and comparative tolerability among the three treatment regimens.

Condition Intervention Phase
Mycobacterium Avium-Intracellulare Infection
HIV Infections
Drug: Ethambutol hydrochloride
Drug: Clarithromycin
Drug: Rifabutin
Phase 3

Study Type: Interventional
Study Design: Endpoint Classification: Efficacy Study
Masking: Double-Blind
Primary Purpose: Treatment
Official Title: A Three-Arm Comparative Trial for the Treatment of MAC Bacteremia in AIDS: A Clarithromycin/Ethambutol Regimen Containing Rifabutin (450 Mg) or Rifabutin (300 Mg) or Placebo

Resource links provided by NLM:

Further study details as provided by NIH AIDS Clinical Trials Information Service:

Estimated Enrollment: 450
Detailed Description:
Patients are randomized to receive clarithromycin and ethambutol plus either placebo or rifabutin at one of two doses. Treatment continues indefinitely. AS PER AMENDMENT 04/19/94: Doses of rifabutin have been lowered.

Ages Eligible for Study:   13 Years and older   (Child, Adult, Senior)
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   No

Inclusion Criteria

Concurrent Medication:


  • Isoniazid for TB prophylaxis ONLY.

Patients must have:

  • HIV infection.
  • MAC infection.
  • Life expectancy of at least 16 weeks.

Exclusion Criteria

Co-existing Condition:

Patients with the following symptoms or conditions are excluded:

  • Perceived unreliability or unavailability for frequent monitoring.

Concurrent Medication:


  • Antimycobacterial drugs other than the study drugs.
  • Carbamazepine.
  • Terfenadine.
  • Theophylline.

Patients with the following prior condition are excluded:

History of hypersensitivity to rifabutin, rifampin, erythromycin, clarithromycin, azithromycin, or ethambutol.

Prior Medication:

Excluded within 7 days prior to study entry:

  • Rifabutin.
  • Rifampin.
  • Ethionamide.
  • Cycloserine.
  • Clofazimine.
  • Ethambutol.
  • Amikacin.
  • Ciprofloxacin.
  • Ofloxacin.
  • Sparfloxacin.
  • Azithromycin.
  • Clarithromycin.
  • Pyrazinamide.

Excluded within 14 days prior to study entry:

  • Carbamazepine.
  • Terfenadine.
  • Theophylline.
  Contacts and Locations
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Please refer to this study by its identifier: NCT00002101

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Sponsors and Collaborators
  More Information Identifier: NCT00002101     History of Changes
Other Study ID Numbers: 048D  CS 087250-999 
Study First Received: November 2, 1999
Last Updated: June 23, 2005
Health Authority: United States: Food and Drug Administration

Keywords provided by NIH AIDS Clinical Trials Information Service:
Mycobacterium avium-intracellulare Infection
Drug Therapy, Combination
Acquired Immunodeficiency Syndrome

Additional relevant MeSH terms:
HIV Infections
Communicable Diseases
Mycobacterium Infections
Mycobacterium avium-intracellulare Infection
Lentivirus Infections
Retroviridae Infections
RNA Virus Infections
Virus Diseases
Sexually Transmitted Diseases, Viral
Sexually Transmitted Diseases
Immunologic Deficiency Syndromes
Immune System Diseases
Actinomycetales Infections
Gram-Positive Bacterial Infections
Bacterial Infections
Systemic Inflammatory Response Syndrome
Pathologic Processes
Mycobacterium Infections, Nontuberculous
Antitubercular Agents
Anti-Bacterial Agents
Anti-Infective Agents
Antibiotics, Antitubercular
Protein Synthesis Inhibitors processed this record on October 25, 2016