A Double-Blind, Randomized Parallel Group Study Comparing Procysteine to Placebo in HIV-Infected Patients Who Are Taking Antiretroviral Nucleosides

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. Identifier: NCT00002114
Recruitment Status : Completed
First Posted : August 31, 2001
Last Update Posted : June 24, 2005
Information provided by:
NIH AIDS Clinical Trials Information Service

Brief Summary:
To compare the efficacy and safety of orally administered Procysteine with placebo in HIV-infected patients who are receiving 1 of the following: (1) zidovudine (AZT) alone; (2) didanosine (ddI) alone; (3) AZT plus ddI; or (4) AZT plus zalcitabine (ddC).

Condition or disease Intervention/treatment Phase
HIV Infections Drug: Procysteine Phase 2

Detailed Description:
All patients must receive treatment with antiretroviral nucleosides in addition to study treatment. Patients are randomized equally into 1 of 3 outpatient dosage groups. Group 1 receives placebo; Group 2 receives a low dose of Procysteine; and Group 3 receives a higher dose of Procysteine. Patients receive study treatment for 6 months (total duration of patient participation is 30 weeks).

Study Type : Interventional  (Clinical Trial)
Enrollment : 125 participants
Masking: Double
Primary Purpose: Treatment
Official Title: A Double-Blind, Randomized Parallel Group Study Comparing Procysteine to Placebo in HIV-Infected Patients Who Are Taking Antiretroviral Nucleosides
Study Completion Date : January 1994

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MedlinePlus related topics: HIV/AIDS

Information from the National Library of Medicine

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Ages Eligible for Study:   18 Years and older   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria

Concurrent Medication:


Antiretroviral nucleosides (AZT alone, ddI alone, AZT plus ddI, or AZT plus ddC). Regimen may be altered on or after Week 16.


  • Appropriate topical treatment or local radiotherapy for KS.
  • Treatment or prophylaxis for opportunistic infections, including pentamidine, cotrimoxazole, acyclovir, fluconazole, etc., at the discretion of the investigator.

Patients must have:

  • Documented serologic evidence confirming HIV infection.
  • Ability to participate in an outpatient study for at least 26 weeks.
  • Either:
  • (a) diagnosis of AIDS or AIDS-Related Complex (ARC) with CD4 count of 50 - 300 cells/mm3, or (b) CD4 count of 50 - 200 cells/mm3 and no symptoms of AIDS (asymptomatic). (Note:
  • Patients whose AIDS-defining condition is Kaposi's sarcoma alone must have CD4 count of 50 - 200 cells/mm3.)

Exclusion Criteria

Co-existing Condition:

Patients with the following symptoms or conditions are excluded:

  • Evidence of organ involvement with CMV and/or positive blood cultures for Mycobacterium avium.
  • Life expectancy less than 26 weeks.
  • Malignancy or advancing Kaposi's sarcoma (KS) with advancing or unstable skin lesion, or known or suspected visceral disease which requires systemic cytotoxic, myelosuppressive chemotherapy.
  • Stage 2 or greater AIDS-dementia complex (ADC), defined as ability to perform basic activities of self-care but inability to work or maintain more demanding aspects of daily life as a result of an acquired decrease in cognitive CNS-related motor function characteristic of ADC.
  • Psychological or emotional problems that prevent adequate compliance with study therapy.

Concurrent Medication:


  • Daily Vitamin C dosage greater than 1,000 mg or daily Vitamin E dosage greater than 100 units.
  • N-acetylcysteine, cysteine, or glutathione.
  • Any investigational drug.
  • Systemic chemotherapy.

Patients with the following prior conditions are excluded:

  • History of organ involvement with cytomegalovirus (CMV) and/or positive blood cultures for Mycobacterium avium.
  • Intractable diarrhea, defined as greater than 4 bowel movements per day for at least 2 weeks.
  • History of seizures which have not been controlled with appropriate anticonvulsant medications within the previous 6 months.

Prior Medication:


  • Any investigational agent or biological response modifier (including interferon or corticosteroids) within 1 month of study entry.
  • Use of erythropoietin (EPO), G-CSF, or GM-CSF within 28 days of randomization.

Risk Behavior:


Active alcohol or drug abuse.


Antiretroviral nucleosides (AZT alone, ddI alone, AZT plus ddI, or AZT plus ddC) for at least 3 months prior to study entry. Identifier: NCT00002114     History of Changes
Other Study ID Numbers: 215A
First Posted: August 31, 2001    Key Record Dates
Last Update Posted: June 24, 2005
Last Verified: January 1994

Additional relevant MeSH terms:
HIV Infections
Lentivirus Infections
Retroviridae Infections
RNA Virus Infections
Virus Diseases
Sexually Transmitted Diseases, Viral
Sexually Transmitted Diseases
Immunologic Deficiency Syndromes
Immune System Diseases
Anti-Retroviral Agents
Antiviral Agents
Anti-Infective Agents