Clinical Trials


A Study of the Safety and Effectiveness of Hydroxyurea in Patients on Potent Antiretroviral Therapy and Who Have Less Than 200 Copies/ml of HIV RNA in Their Blood

This study has been completed
National Institute of Allergy and Infectious Diseases (NIAID)

Information provided by (Responsible Party)
National Institute of Allergy and Infectious Diseases (NIAID) Identifier

First received: November 2, 1999
Last updated: May 17, 2012
Last Verified: May 2012
History of Changes


This study compares the safety and effectiveness of continuing your current anti-HIV medications to that of adding or switching some of your anti-HIV medications. It will follow the effect of these medication changes, including the addition of hydroxyurea (HU), on long-term viral suppression. Other medications which may be added include didanosine (ddI) and/or stavudine (d4T).

Patients receiving combination antiretroviral therapy with indinavir (IDV), zidovudine (ZDV)(or d4T) and lamivudine (3TC) show viral suppression for two years or more. Discontinuation of one or two of these drugs results in prompt loss of the viral suppression. Other studies show that addition of HU to some reverse transcriptase inhibitor treatments results in increased antiviral effects. This study will provide further information on the effect of adding HU to a treatment regimen with respect to long-term viral suppression.

Condition Intervention Phase
HIV Infections

Drug : Indinavir sulfate
Drug : Lamivudine/Zidovudine
Drug : Hydroxyurea
Drug : Lamivudine
Drug : Stavudine
Drug : Zidovudine
Drug : Didanosine
Phase 2

Study Type: Interventional
Study Design: Allocation: Randomized
Primary Purpose: Treatment
Official Title: A Phase II, Randomized Study of the Safety and Efficacy of Hydroxyurea in Subjects on Potent Antiretroviral Therapy With Less Than 200 Copies/ml of HIV RNA in the Plasma

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

Enrollment: 399
Study Completion Date: August 2004

Detailed Description:

Previous ACTG studies show that discontinuation of one or two of a three-drug regimen (IDV, ZDV, 3TC) leads to prompt loss of viral suppression in the plasma. In this trial, it will be determined whether adding hydroxyurea (HU) to a suppressive regimen increases long term viral suppression. Important safety information on the tolerance of HU regimen will be characterized in asymptomatic patients with viral suppression.
Patients are equally randomized to one of three arms and receive treatment as follows:Arm A: IDV plus ddI plus d4T plus HU placebo. Arm B: IDV plus ddI plus d4T plus HU. Arm C: IDV plus 3TC/ZDV (or d4T plus 3TC). Patients are monitored every 8 weeks with plasma HIV RNA levels and CD4 cell counts.



Ages Eligible for Study: 13 Years and older  
Sexes Eligible for Study: All  
Accepts Healthy Volunteers: No  


Inclusion Criteria
You may be eligible for this study if you:

  • Are 13 years or older.
  • Have documented HIV-1 infection.
  • Are currently receiving combined IDV, ZDV(or D4T), and 3TC for at least 6 consecutive months, resulting in HIV RNA less than 200 copies/ml and CD4 cell count greater than 200 cells/mm3.
  • Had a CD4 count greater than 100 cells/mm3 before starting current anti-HIV therapy.
  • Are of childbearing age and agree to practice abstinence or use of combined barrier and hormonal methods of birth control during and for 3 months after the study.

  • Exclusion Criteria
    You will not be eligible for this study if you:
  • Have taken various medications and have various laboratory results (see technical abstract).
  • Have cancer requiring chemotherapy.
  • Have an unexplained fever for 7 days or diarrhea for 15 days in the month before the start of the study.
  • Had prior peripheral neuropathy or hepatitis.
  • Recently underwent radiation, experimental, or infection therapy.
  • Are pregnant or breastfeeding.

contacts and locations

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 identifier: NCT00000916


United States, Alabama
Alabama Therapeutics CRS
Birmingham, Alabama, United States, 35294
United States, California
Stanford CRS
Palo Alto, California, United States, 943055107
Ucsd, Avrc Crs
San Diego, California, United States, 921036325
San Mateo County AIDS Program
San Mateo, California, United States, 943055107
Harbor-UCLA Med. Ctr. CRS
Torrance, California, United States, 90502
United States, Colorado
University of Colorado Hospital CRS
Aurora, Colorado, United States, 80262
United States, Florida
Univ. of Miami AIDS CRS
Miami, Florida, United States, 331361013
United States, Hawaii
Univ. of Hawaii at Manoa, Leahi Hosp.
Honolulu, Hawaii, United States, 96816
United States, Illinois
Northwestern University CRS
Chicago, Illinois, United States, 60611
Weiss Memorial Hosp.
Chicago, Illinois, United States, 60640
United States, Indiana
Indiana Univ. School of Medicine, Wishard Memorial
Indianapolis, Indiana, United States, 462025250
Indiana Univ. School of Medicine, Infectious Disease Research Clinic
Indianapolis, Indiana, United States, 46202
United States, Iowa
Univ. of Iowa Healthcare, Div. of Infectious Diseases
Iowa City, Iowa, United States, 52242
United States, Louisiana
Tulane Hemophilia Treatment Ctr.
New Orleans, Louisiana, United States, 70112
United States, Maryland
Johns Hopkins Adult AIDS CRS
Baltimore, Maryland, United States, 21287
United States, Massachusetts
Massachusetts General Hospital ACTG CRS
Boston, Massachusetts, United States, 02114
Beth Israel Deaconess Med. Ctr., ACTG CRS
Boston, Massachusetts, United States, 02215
United States, Minnesota
University of Minnesota, ACTU
Minneapolis, Minnesota, United States, 55455
United States, Missouri
St. Louis ConnectCare, Infectious Diseases Clinic
St Louis, Missouri, United States, 63112
Washington U CRS
St. Louis, Missouri, United States
United States, Nebraska
Univ. of Nebraska Med. Ctr., Durham Outpatient Ctr.
Omaha, Nebraska, United States, 681985130
United States, New York
Beth Israel Med. Ctr. (Mt. Sinai)
New York, New York, United States, 10003
New York, New York, United States, 10016
Beth Israel Med. Ctr., ACTU
New York, New York, United States
Univ. of Rochester ACTG CRS
Rochester, New York, United States, 14642
United States, North Carolina
Unc Aids Crs
Chapel Hill, North Carolina, United States, 275997215
Carolinas HealthCare System, Carolinas Med. Ctr.
Charlotte, North Carolina, United States, 28203
Regional Center for Infectious Disease, Wendover Medical Center CRS
Greensboro, North Carolina, United States, 27401
United States, Ohio
Univ. of Cincinnati CRS
Cincinnati, Ohio, United States, 452670405
Case CRS
Cleveland, Ohio, United States, 44106
MetroHealth CRS
Cleveland, Ohio, United States, 441091998
The Ohio State Univ. AIDS CRS
Columbus, Ohio, United States, 432101228
United States, Pennsylvania
Hosp. of the Univ. of Pennsylvania CRS
Philadelphia, Pennsylvania, United States, 19104
United States, Washington
University of Washington AIDS CRS
Seattle, Washington, United States, 98104

Sponsors and Collaborators

National Institute of Allergy and Infectious Diseases (NIAID)


Study Chair: Havlir D; Richman D
Study Chair: Collier A
Study Chair: Hirsch M
Study Chair: Tebas P
More Information

More Information

Responsible Party: National Institute of Allergy and Infectious Diseases (NIAID) Identifier: NCT00000916   History of Changes  
Other Study ID Numbers: A5025  
  ACTG A5025  
Study First Received: November 2, 1999  
Last Updated: May 17, 2012  

Keywords provided by National Institute of Allergy and Infectious Diseases (NIAID):

Drug Therapy, Combination
HIV Protease Inhibitors
Reverse Transcriptase Inhibitors
Anti-HIV Agents
Viral Load

Additional relevant MeSH terms:
HIV Infections
Lamivudine, zidovudine drug combination
Hydroxyurea processed this data on March 27, 2020
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