A Randomized Prospective Study of Pyrimethamine Therapy for Prevention of Toxoplasmic Encephalitis in HIV-Infected Individuals With Serologic Evidence of Latent Toxoplasma Gondii Infection

This study has been completed.
Sponsor:
Information provided by:
National Institute of Allergy and Infectious Diseases (NIAID)
ClinicalTrials.gov Identifier:
NCT00000666
First received: November 2, 1999
Last updated: October 26, 2012
Last verified: October 2012
  Purpose

To evaluate pyrimethamine as a prophylactic agent against toxoplasmic encephalitis in individuals who are coinfected with HIV and latent Toxoplasma gondii.

Toxoplasmic encephalitis is a major cause of illness and death in AIDS patients. Standard treatment for toxoplasmic encephalitis is to combine pyrimethamine and sulfadiazine. Continuous treatment is necessary to prevent recurrence of the disease, but constant use of pyrimethamine/sulfadiazine is associated with toxicity. Clindamycin has been shown to be effective in treatment of toxoplasmic encephalitis in animal studies. This study evaluates pyrimethamine as a preventive treatment against toxoplasmic encephalitis (per 3/26/91 amendment, clindamycin arm was discontinued).


Condition Intervention
Toxoplasmosis, Cerebral
HIV Infections
Drug: Pyrimethamine

Study Type: Interventional
Study Design: Intervention Model: Parallel Assignment
Primary Purpose: Prevention
Official Title: A Randomized Prospective Study of Pyrimethamine Therapy for Prevention of Toxoplasmic Encephalitis in HIV-Infected Individuals With Serologic Evidence of Latent Toxoplasma Gondii Infection

Resource links provided by NLM:


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

Estimated Enrollment: 600
Study Completion Date: March 1992
Detailed Description:

Toxoplasmic encephalitis is a major cause of illness and death in AIDS patients. Standard treatment for toxoplasmic encephalitis is to combine pyrimethamine and sulfadiazine. Continuous treatment is necessary to prevent recurrence of the disease, but constant use of pyrimethamine/sulfadiazine is associated with toxicity. Clindamycin has been shown to be effective in treatment of toxoplasmic encephalitis in animal studies. This study evaluates pyrimethamine as a preventive treatment against toxoplasmic encephalitis (per 3/26/91 amendment, clindamycin arm was discontinued).

Patients are randomized to receive pyrimethamine or placebo three times a week. All patients must be on aerosolized pentamidine, trimethoprim / sulfamethoxazole (T/S), or dapsone for Pneumocystis carinii pneumonia prophylaxis. Patients will be evaluated bi-weekly for the first month and every other month thereafter for at least 24 months.

  Eligibility

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

Inclusion Criteria

Concurrent Medication:

Required:

  • Prophylactic treatment for Pneumocystis carinii pneumonia with aerosolized pentamidine, dapsone, or trimethoprim / sulfamethoxazole.

Allowed:

  • Most medications not specifically excluded.

Prior Medication:

Allowed:

  • Antivirals.
  • Antiretrovirals.

Patients:

  • Must be HIV positive or have an AIDS-defining illness OR be at known risk for HIV infection and have a CD4 cell count < 200/mm3 and no other known immunosuppressive disease.
  • Must have positive titer for Toxoplasma gondii.
  • Must be or become a patient of a CPCRA physician.
  • May participate in other clinical trials as long as there is no potential activity against Toxoplasma gondii or cross-toxicity among study drugs.

Exclusion Criteria

Co-existing Condition:

Patients with the following conditions or symptoms are excluded:

  • History of ocular, pulmonary, or central nervous system (CNS) toxicity.
  • CNS lesions.
  • Neurologic deficits except peripheral neuropathy.
  • Mild, moderate, severe, or end-stage AIDS dementia complex. Grade 3 or higher nausea and/or vomiting.
  • Sensitivity to pyrimethamine.

Concurrent Medication:

Excluded:

  • On-going therapy with clindamycin, fansidar, methotrexate, trimetrexate, spiramycin, azithromycin, clarithromycin, 566C80, and/or sulfa agents other than anti-PCP agents.

Patients with the following are excluded:

  • History of ocular, pulmonary, or central nervous system (CNS) toxicity.
  • CNS lesions or history of CNS lesions.
  • Neurologic deficits except peripheral neuropathy.
  • Mild, moderate, severe, or end-stage AIDS dementia complex. Grade 3 or higher nausea and/or vomiting.
  • Sensitivity to pyrimethamine.
  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: NCT00000666

Locations
United States, California
Community Consortium of San Francisco
San Francisco, California, United States, 94110
United States, Colorado
Denver CPCRA / Denver Public Hlth
Denver, Colorado, United States, 802044507
United States, Connecticut
Hill Health Corp
New Haven, Connecticut, United States, 06519
United States, Delaware
Wilmington Hosp / Med Ctr of Delaware
Wilmington, Delaware, United States, 19899
United States, Georgia
AIDS Research Consortium of Atlanta
Atlanta, Georgia, United States, 30308
United States, Illinois
AIDS Research Alliance - Chicago
Chicago, Illinois, United States, 60657
United States, Louisiana
Louisiana Comm AIDS Rsch Prog / Tulane Univ Med
New Orleans, Louisiana, United States, 70112
United States, Michigan
Henry Ford Hosp
Detroit, Michigan, United States, 48202
Comprehensive AIDS Alliance of Detroit
Detroit, Michigan, United States, 48201
United States, New Jersey
North Jersey Community Research Initiative
Newark, New Jersey, United States, 071032842
United States, New York
Bronx Lebanon Hosp Ctr
Bronx, New York, United States, 10456
Addiction Research and Treatment Corp
Brooklyn, New York, United States, 11201
Harlem AIDS Treatment Group / Harlem Hosp Ctr
New York, New York, United States, 10037
Clinical Directors Network of Region II
New York, New York, United States, 10011
United States, Oregon
Portland Veterans Adm Med Ctr / Rsch & Education Grp
Portland, Oregon, United States, 972109951
United States, Virginia
Richmond AIDS Consortium
Richmond, Virginia, United States, 23298
Sponsors and Collaborators
Investigators
Study Chair: Jacobson M
Study Chair: Besch CL
  More Information

Publications:
ClinicalTrials.gov Identifier: NCT00000666     History of Changes
Other Study ID Numbers: CPCRA 001
Study First Received: November 2, 1999
Last Updated: October 26, 2012
Health Authority: United States: Federal Government

Keywords provided by National Institute of Allergy and Infectious Diseases (NIAID):
Toxoplasmosis
AIDS-Related Opportunistic Infections
Pyrimethamine
Drug Evaluation
Encephalitis
Acquired Immunodeficiency Syndrome

Additional relevant MeSH terms:
HIV Infections
Acquired Immunodeficiency Syndrome
Encephalitis
Toxoplasmosis
Toxoplasmosis, Cerebral
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
Central Nervous System Viral Diseases
Brain Diseases
Central Nervous System Diseases
Nervous System Diseases
Central Nervous System Infections
Coccidiosis
Protozoan Infections
Parasitic Diseases
Brain Abscess
Abscess
Suppuration
Infection
Central Nervous System Protozoal Infections
Central Nervous System Parasitic Infections
Pyrimethamine
Antimalarials

ClinicalTrials.gov processed this record on August 21, 2014