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Contingency Management for Methamphetamine Abstinence and HIV Post-Exposure Prophylaxis in Men Who Have Sex With 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. Identifier: NCT00856323
Recruitment Status : Completed
First Posted : March 5, 2009
Results First Posted : November 27, 2012
Last Update Posted : September 20, 2016
University of California, Los Angeles
Information provided by (Responsible Party):
Friends Research Institute, Inc.

Brief Summary:
This study seeks to decrease methamphetamine use and concomitant high-risk sexual behaviors among methamphetamine-using men who have sex with men (MSM) by combining a biomedical intervention with a behavioral intervention. The behavioral intervention will consist of an 8-week course of contingency management (CM) through which participants will be reinforced for testing negative for methamphetamine metabolites during periodic urine analyses. The biomedical intervention involves a 28-day course of an antiretroviral drug (Truvada) to be administered after an unanticipated HIV risk exposure (i.e., engaging in either receptive or insertive anal sex without a condom with someone who is HIV-positive or of unknown status). In combining these two interventions, this study seeks to evaluate the combined intervention's effects on sexual risk behaviors and methamphetamine use.

Condition or disease Intervention/treatment Phase
Amphetamine-Related Disorders HIV HIV Infections Drug: Truvada Behavioral: CM Phase 2

Detailed Description:
At the baseline, all eligible participants underwent informed consent; completed baseline assessments; received rapid HIV testing; provided specimens for syphilis, gonorrhea and chlamydia testing; and received a medical examination. Those who reported a high-risk sexual or drug exposure episode with an HIV-positive or serostatus-unknown source within the preceding 72 hours immediately initiated postexposure prophylaxis. All other participants received a 4-day ''starter pack'' of Truvada to be initiated only in the case of a future high-risk exposure to HIV. All participants began the voucher-based CM intervention upon study entry. For the initial 8 weeks of study conduct, participants presented to the study site three times weekly for a urine drug screen for methamphetamine metabolites. Participants who provided urine samples that were negative for methamphetamine metabolites earned vouchers, which escalated in value for successive negative urine samples. A participant with a missing sample or a sample positive for methamphetamine metabolites did not earn vouchers. Accrued vouchers were never forfeited and could be redeemed at any time during the study for gift certificates or goods or services that promote healthy, pro-social behaviors; vouchers could not be redeemed for cash.

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Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 53 participants
Intervention Model: Single Group Assignment
Masking: None (Open Label)
Primary Purpose: Prevention
Official Title: Biobehavioral Interventions for HIV-negative Methamphetamine-using MSM
Study Start Date : January 2009
Actual Primary Completion Date : December 2010
Actual Study Completion Date : December 2010

Resource links provided by the National Library of Medicine

Arm Intervention/treatment
Experimental: PEP/CM
Participants are provided contingency management vouchers for methamphetamine abstinence, and can initiate postexposure prophylaxis (Truvada; 1 pill daily for 28 days) after non-occupational exposure to HIV.
Drug: Truvada
At qualifying exposure, participants will take 28 days' worth (at one pill per day) of 200 mg emtricitabine and 300 mg tenofovir DF (Truvada).
Other Name: Emtricitabine and tenofovir disoproxil fumarate

Behavioral: CM
Participants will submit a urine sample every Monday, Wednesday, and Friday for 8 weeks (a total of 24 urine samples). Samples will be tested for methamphetamine metabolites.
Other Name: Contingency Management

Primary Outcome Measures :
  1. Self-reported Methamphetamine Use in Previous 30 Days. [ Time Frame: 3-months after baseline ]
    Mean number of days (of the past 30) of methamphetamine use.

Secondary Outcome Measures :
  1. Description of Incident STI Infections. [ Time Frame: Baseline and 3-months ]
    Proportional 3-month incidence of syphilis, rectal gonorrhea, pharyngeal gonorrhea, and rectal Chlamydia.

  2. HIV-related Sexual Risk Behaviors in Previous 30 Days. [ Time Frame: 3-months after baseline ]
    Self-reported episodes of Unprotected Anal Intercourse in the previous 30 days.

  3. Post-Exposure Prophylaxis Medication Adherence [ Time Frame: 28-days ]
    Median medication adherence rate, defined as the proportion of pills taken relative to the number of pills prescribed (i.e., # of pills taken / # of pills prescribed).

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:   Male
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Individual must identify as a male who has sex with other men (MSM);
  • At least 18 years of age;
  • HIV negative serostatus on baseline rapid oral HIV antibody test;
  • Self-reported methamphetamine use within the previous 72 hours and test positive for methamphetamine metabolites at baseline;
  • Self-reported unprotected anal intercourse (either receptive or insertive) with an HIV-positive or status unknown partner within the previous 3 months;
  • Self-reports no previous hypersensitivity to any of the components of Truvada (tenofovir disoproxil fumarate or emtricitabine);
  • Willing to comply with study requirements (i.e., monitored urine testing three times per week, meet with physician within first week of enrollment, begin medication immediately following an unexpected high-risk sexual exposure, and contact the clinic and meet with physician within 92 hours of unexpected high-risk sexual exposure).

Exclusion Criteria:

  • Does not identify as a male who has sex with other men;
  • Under 18 years of age;
  • HIV positive, by self-report or as indicated by the results on the baseline rapid oral HIV antibody test;
  • Self-reports any previous hypersensitivity to any of the components of Truvada;
  • Has not used methamphetamine in the previous 72 hours and does not test positive for methamphetamine metabolites;
  • Has not had unprotected anal intercourse with an HIV-positive or status unknown partner within the previous 3 months;
  • Unwilling to comply with study requirements.

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 identifier (NCT number): NCT00856323

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United States, California
Friends Community Center
Los Angeles, California, United States, 90028
Sponsors and Collaborators
Friends Research Institute, Inc.
University of California, Los Angeles
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Principal Investigator: Cathy J Reback, Ph.D. Friends Research Institute, Inc.
Principal Investigator: Raphael J Landovitz, M.D. UCLA Center for Clinical AIDS Research and Education
Principal Investigator: Steve Shoptaw, Ph.D. UCLA Department of Family Medicine

Publications of Results:
Publications automatically indexed to this study by Identifier (NCT Number):
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Responsible Party: Friends Research Institute, Inc. Identifier: NCT00856323    
Other Study ID Numbers: 702632
First Posted: March 5, 2009    Key Record Dates
Results First Posted: November 27, 2012
Last Update Posted: September 20, 2016
Last Verified: August 2016
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD: No
Keywords provided by Friends Research Institute, Inc.:
Post-exposure prophylaxis
HIV seronegativity
Additional relevant MeSH terms:
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Amphetamine-Related Disorders
Substance-Related Disorders
Chemically-Induced Disorders
Mental Disorders
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
Central Nervous System Stimulants
Physiological Effects of Drugs
Autonomic Agents
Peripheral Nervous System Agents
Dopamine Agents
Neurotransmitter Agents
Adrenergic Agents
Adrenergic Uptake Inhibitors
Neurotransmitter Uptake Inhibitors
Membrane Transport Modulators
Dopamine Uptake Inhibitors