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Comparison of Epzicom and Truvada for the Initial Once Daily HIV Treatment

Information source: International Medical Center of Japan
ClinicalTrials.gov processed this data on August 23, 2015
Link to the current ClinicalTrials.gov record.

Condition(s) targeted: HIV Infections

Intervention: lamivudine, abacavir , ritonavir, atazanavir (Drug); emtricitabine, tenofovir, ritonavir, atazanavir (Drug)

Phase: Phase 4

Status: Completed

Sponsored by: International Medical Center of Japan

Official(s) and/or principal investigator(s):
Shinichi Oka, MD, Study Chair, Affiliation: International Medical Center of Japan


A non-inferiority randomized control trial in treatment na´ve HIV patients to compare virologic effect of two backbone regimens with Epzicom (lamivudine and abacavir) and Truvada (emtricitabine and tenofovir). Both arms are treated with fixed combination of ritonavir boosted atazanavir as key drugs.

Clinical Details

Official title: A Randomized, Open Label, Multicenter Study Comparing the Safety and Efficacy of Once Daily Regimen Containing Epzicom or Truvada Combined With Ritonavir Boosted Atazanavir as Initial Therapy for HIV-1 Infection (ET Study)

Study design: Allocation: Randomized, Endpoint Classification: Safety/Efficacy Study, Intervention Model: Parallel Assignment, Masking: Open Label, Primary Purpose: Treatment

Primary outcome: antiretroviral effect over 48 weeks

Secondary outcome:

The immunologic effects from baseline at the 48th and 144th week

Reasons of treatment failure by 144th week

Adverse events and their rate of incidence by 144th week

Detailed description: In treatment na´ve HIV-1-infected patients, once daily combination antiretroviral therapy containing ritonavir boosted atazanavir combined with Epzicom will offer non inferior antiretroviral efficacy compared to ritonavir boosted atazanavir combined with Truvada. This non inferiority hypothesis is studied by a randomized, open label, multicenter trial over 48 weeks as the primary endpoint and long term safety of both arms are followed for 144 weeks. The primary endpoint is the antiretroviral effect over 48 weeks. The secondary endpoints are; 1. The immunologic effects from baseline at the 48th and 144th week 2. Reasons of treatment failure by 144th week 3. Adverse events and their rate of incidence by 144th week 4. Serum concentration of tenofovir in selected patients 5. Serum concentration of atazanavir in selected patients 6. Renal complication in tenofovir arm


Minimum age: 20 Years. Maximum age: N/A. Gender(s): Both.


Inclusion Criteria:

- Clinical diagnosis of HIV infection,

- Antiretroviral initiation is recommended by current clinical guidelines,

- Treatment naïve,

- Age over 20 years old Japanese,

- Able to obtain written informed consent

Exclusion Criteria:

- Current malabsorption condition,

- Prior use of lamivudine for hepatitis B treatment,

- Positive serology of Hepatitis B surface antigen,

- Patients who have following abnormal laboratory results within 6 weeks prior

enrollment; 1. alanine aminotransferase is more than 2. 5 times higher of upper normal limit 2. estimated glomerular filtration rate is less than 60ml/min by Cockcroft-Gault equation 3. serum phosphate level is less than 2. 0mg/dl

- Patients with hemophilia, diabetes mellitus which require pharmacological treatment,

congestive heart failure, cardiomyopathy or other serious medical condition

- Patients in pregnancy or breat feeding

- Patients who are taking medications contraindicated combine use of study medicine

- Patients whose primary care physicians consider inadequate to be enroll the study

Locations and Contacts

International Medical Center of Japan, Shinjuku, Tokyo 1628655, Japan
Additional Information

Starting date: October 2007
Last updated: March 27, 2015

Page last updated: August 23, 2015

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