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Emtricitabine/Tenofovir Disoproxil Fumarate for HIV Prevention in Men

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.
ClinicalTrials.gov Identifier: NCT00458393
Recruitment Status : Completed
First Posted : April 10, 2007
Last Update Posted : February 9, 2016
Information provided by (Responsible Party):

Study Description
Brief Summary:
The purpose of this study is to determine whether daily use of emtricitabine/tenofovir disoproxil fumarate (FTC/TDF) can prevent HIV infection in men who also receive HIV counseling, condoms, and treatment for other sexually transmitted infections (STIs).

Condition or disease Intervention/treatment Phase
HIV Infections Drug: Emtricitabine/tenofovir disoproxil fumarate Drug: Placebo Phase 3

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Study Design

Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 2653 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double (Participant, Investigator)
Primary Purpose: Prevention
Official Title: Chemoprophylaxis for HIV Prevention in Men
Study Start Date : June 2007
Primary Completion Date : February 2014
Study Completion Date : February 2014

Resource links provided by the National Library of Medicine

MedlinePlus related topics: HIV/AIDS
U.S. FDA Resources

Arms and Interventions

Arm Intervention/treatment
Experimental: 1
Daily oral emtricitabine/tenofovir disoproxil fumarate
Drug: Emtricitabine/tenofovir disoproxil fumarate
Fixed-dose coformulation of 200 mg emtricitabine and 300 mg tenofovir disoproxil fumarate
Placebo Comparator: 2
Daily oral placebo
Drug: Placebo
Placebo for emtricitabine/tenofovir disoproxil fumarate

Outcome Measures

Primary Outcome Measures :
  1. Anti-HIV seroconversion [ Time Frame: At 36 months ]
  2. Safety endpoints, including Grade 1 or higher creatinine toxicity; Grade 3 or higher phosphorous toxicity; Grade 2, 3, or 4 laboratory adverse events; or Grade 2, 3, or 4 clinical adverse events; or HIV seroconversion [ Time Frame: Throughout study ]

Secondary Outcome Measures :
  1. Hepatitis flares among hepatitis B virus (HBV) infected persons during and after chemoprophylaxis [ Time Frame: At 42 months ]
  2. Changes in bone mineral density, body fat distribution, or fasting triglyceride and cholesterol levels [ Time Frame: At 42 months ]
  3. Among HIV infected participants: viral load, drug resistance, and CD4 count [ Time Frame: At 42 months ]
  4. Proportion of missed doses by pill count and by estimate during CASI interview [ Time Frame: At 36 months ]
  5. Risk behavior, including number of sexual partners with HIV positive or unknown status, total number of sexual partners, and condom use before, during, and after use of study medication [ Time Frame: At 42 months ]
  6. Prevalence of sexually transmitted infections (STIs) before, during, and after use of study medication [ Time Frame: At 42 months ]

Eligibility Criteria

Information from the National Library of Medicine

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Ages Eligible for Study:   18 Years and older   (Adult, Senior)
Sexes Eligible for Study:   Male
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • Male sex (at birth)
  • HIV uninfected
  • Age having reached the local age of consent
  • High risk for HIV infection including any of the following: 1) No condom use during anal intercourse with a male HIV-positive partner or a male partner of unknown HIV status during the last 6 months; (2) anal intercourse with more than 3 male sex partners during the last 6 months; (3) exchange of money, gifts, shelter, or drugs for anal sex with a male partner during the last 6 months; (4) sex with a male partner and STI diagnosis during the last 6 months or at screening, or (5) sexual partner of an HIV-infected man with whom condoms are not consistently used in the last 6 months.
  • Able to provide a street address of residence for themselves and one personal contact who would know their whereabouts during the study period
  • Healthy enough to work, as indicated by score of 80 or greater on the Karnofsky scale
  • Certain laboratory values
  • A urine dipstick with a negative or trace result for both glucose and protein within 28 days of enrollment.
  • Ability to understand and local language for which an informed consent form has been approved by a local IRB and registered with the study sponsor.

Inclusion Criteria for Open-Label Extension:

  • Participated in a randomized, placebo-controlled, PrEP trail
  • Has been unblinded
  • Has provided informed consent

Exclusion Criteria:

  • Previously diagnosed active and serious infections, including tuberculosis infection, osteomyelitis, or infections requiring parenteral antibiotic therapy
  • Active clinically significant medical problems including heart disease (e.g., symptoms of ischemia, congestive heart failure, arrhythmia), lung disease (steroid-dependent chronic obstructive pulmonary disease), diabetes requiring hypoglycemic medication, or previously diagnosed cancer expected to require further treatment
  • Acute HBV infection at the screening visit or presence of treatment indications for hepatitis B based on local practice standards; or clinical signs of hepatic cirrhosis
  • History of pathological bone fractures not related to trauma
  • Receiving ongoing therapy with certain HIV/AIDS-related medications or other medications as determined by the investigator
  • Definitely or possibly received an anti-HIV vaccine while participating in a blinded clinical trial
  • Current alcohol or drug use that, in the opinion of the investigator, may interfere with the study
  • Current participation in a clinical trial or cohort study other than sub-studies of this protocol
  • Any condition at enrollment that, in the opinion of the investigator, would make participation in the study unsafe or would interfere with the study
  • Sites may utilize additional criteria that restrict enrollment to a subset of people who meet the protocol-defined enrollment criteria.

Exclusion Criteria for Open-Label Extension:

- Site leadership believes participant will have difficulty completing requirements

Contacts and Locations

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT00458393

United States, California
San Francisco Dept. of Public Health iPrEx CRS
San Francisco, California, United States, 94102
United States, Illinois
Stroger Hospital of Cook County/Core Center IPREX CRS
Chicago, Illinois, United States, 60612
United States, Massachusetts
Fenway Community Health iPrEx CRS
Boston, Massachusetts, United States, 02215
Rio de Janeiro, Brazil, 21040-900
Projeto Praca Onze, Universidade Federal do Rio de Janeiro iPrEx CRS
Rio de Janeiro, Brazil, 21941.590
Universidade de Sao Paulo iPrEx CRS
Sao Paulo, Brazil, 05403
Fundación Ecuatoriana Equidad, Guayaquil, iPrEx CRS
Guayaquil, Guayas, Ecuador
Asociación Civil Selva Amazónica, Iquitos, iPrEx CRS
Iquitos, Maynas, Peru
Investigaciones Médicas en Salud (INMENSA), Lince, iPrEx CRS
Lima, Peru
South Africa
Desmond Tutu HIV Ctr. iPrEx CRS
Cape Town, South Africa, 7925
Research Institute for Health Sciences iPrEx CRS
Chiang Mai, Thailand, 50200
Sponsors and Collaborators
National Institute of Allergy and Infectious Diseases (NIAID)
Bill and Melinda Gates Foundation
Principal Investigator: Robert M. Grant, MD, MPH J. David Gladstone Institutes, University of California San Francisco
More Information

Publications automatically indexed to this study by ClinicalTrials.gov Identifier (NCT Number):

Responsible Party: National Institute of Allergy and Infectious Diseases (NIAID)
ClinicalTrials.gov Identifier: NCT00458393     History of Changes
Obsolete Identifiers: NCT00350324
Other Study ID Numbers: iPrEx
10445 ( Registry Identifier: DAIDS ES )
U01AI064002 ( U.S. NIH Grant/Contract )
Peru PrEP
5U01AI064002-02 ( U.S. NIH Grant/Contract )
First Posted: April 10, 2007    Key Record Dates
Last Update Posted: February 9, 2016
Last Verified: February 2016

Keywords provided by National Institute of Allergy and Infectious Diseases (NIAID):
Viral human hepatitis
HIV Seronegativity

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
Emtricitabine, Tenofovir Disoproxil Fumarate Drug Combination
Antiviral Agents
Anti-Infective Agents
Reverse Transcriptase Inhibitors
Nucleic Acid Synthesis Inhibitors
Enzyme Inhibitors
Molecular Mechanisms of Pharmacological Action
Anti-Retroviral Agents
Anti-HIV Agents