"OK 2004 Study" (Only Kaletra 2004 Study): Study to Evaluate Suspending Nucleosides From Triple-Drug Therapy in HIV Subjects

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: NCT00114933
Recruitment Status : Completed
First Posted : June 21, 2005
Last Update Posted : March 21, 2008
Pulido, Federico, M.D.
Information provided by:
Arribas, Jose R., M.D.

June 20, 2005
June 21, 2005
March 21, 2008
January 2005
Not Provided
% patients with therapeutic failure in both arms at 48 weeks (OT and ITT)
Same as current
Complete list of historical versions of study NCT00114933 on Archive Site
  • % patients with virological failure: HIV-RNA > 500 cop/ml under the randomly assigned therapy (OT and ITT)
  • % patients with HIV RNA < 500 cop/ml and < 50 cop/ml at w24, w48 (OT and ITT)
  • Time to virological failure per Kaplan Meyer analysis
  • CD4 cell count change from baseline
  • Percentage of viruses with resistance in the protease gene at w24 and w48
  • Description of AEs with probable, possible or unknown relationship to study drug
Same as current
Not Provided
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"OK 2004 Study" (Only Kaletra 2004 Study): Study to Evaluate Suspending Nucleosides From Triple-Drug Therapy in HIV Subjects
Phase III-IV, Comparative, Randomized, Open-Label, Study to Evaluate Safety and Efficacy of Suspending Nucleosides From a Triple-Drug Therapy Based on Lopinavir/Ritonavir Versus Continuing Triple-Drug Therapy in HIV-Infected Subjects With Undetectable Plasma HIV Viremia for Six Months
Lopinavir/ritonavir monotherapy may maintain virologic suppression in patients who have been undetectable for six months while on triple drug antiretroviral therapy. Lopinavir/ritonavir pharmacokinetics might prevent resistance development in patients who experience virological rebound after single-drug simplification.

Primary Study Objective: Efficacy and durability of switching to lopinavir/ritonavir single-drug HAART compared to maintaining therapy based on lopinavir/ritonavir and two nucleosides

Secondary Study Objective(s):

  • Safety (related drug AEs/SAEs and laboratory anomalies G3/4) through 48 w.
  • Resistance profile on patients with sustained virological failure
  • QOL comparing stopping nucleosides versus continuing therapy
  • Pharmaco-economic analysis comparing treatment cost between the 2 study arms.
  • Predicting factors of failure in the stopping nucleosides arm

Subject Population: 200 patients

Study Design:


Patients are randomized (1:1) either to continue under the same treatment or stop nucleosides as follows:

  • Stopping nucleosides arm: Lopinavir/r alone.
  • Continuing arm: Lopinavir/r + 2 NRTIs

STUDY PROCEDURES: A baseline HIV-RNA, CD4 and routine labs will be collected if the most recent results are not collected within the 4 weeks prior entering the study. Patients will be followed for HIV-RNA (and CD4) at w1, w4, w8, w16, w24, w 36 and w48. After w48, durability of response to lopinavir/r single-drug therapy will be studied long-term (up to w96). Routine hematology and clinical chemistry (including fasting triglycerides and cholesterol, total and HDL/LDL ratio) will be measured at w4, w16, w24, w 36 and w48. A central laboratory will be used for HIV-RNA determinations and to archive plasma/cell samples for further genotype test in case of rebound.

Treatment adherence will be followed with a self-patient report questionnaire (GEEMA study)

All AEs will be collected if suspected relation (possible or probable) to any concomitant ARV drug, and SAEs, related or not, reported within 24h.

Phase 4
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
HIV Infection
Drug: Stopping nucleosides and continuing lopinavir/ritonavir monotherapy
Not Provided

*   Includes publications given by the data provider as well as publications identified by Identifier (NCT Number) in Medline.
Same as current
May 2007
Not Provided

Inclusion Criteria:

  • HIV patients > 18 years old who provide signed and dated Informed consent.
  • HIV patients who have been receiving lopinavir/ritonavir and two nucleosides during at least 4 weeks.
  • Plasma HIV RNA < 50 cop/ml for six months

Exclusion Criteria:

  • HIV patients who have stopped a protease inhibitor due to virological failure.
  • HIV patients with hepatic or renal insufficiency.
  • HIV patients with positive serum HBVAg
  • HIV patients who require treatment with a lopinavir/r contraindicated medication.
  • HIV pregnant or breastfeeding women.
  • Active drug abuse (including alcohol or recreational drugs). Exception, cannabis, provided the investigator is confident in patient adherence. Patients under Methadone program will be accepted too if deemed appropriate by the investigator.
Sexes Eligible for Study: All
18 Years and older   (Adult, Senior)
Contact information is only displayed when the study is recruiting subjects
EudraCT 2004-001323-37
Not Provided
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Arribas, Jose R., M.D.
  • Pulido, Federico, M.D.
  • Abbott
Study Chair: José R. Arribas, MD Hospital La Paz
Study Chair: Federico Pulido, MD Hospital 12 de Octubre
Arribas, Jose R., M.D.
September 2005

ICMJE     Data element required by the International Committee of Medical Journal Editors and the World Health Organization ICTRP