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Showing 1–24 of 125 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Sexual Risk Reduction Clear all
Completed Not applicable Interventional

STD Risk Reduction for Heterosexual Methamphetamine Users

NCT00344214
View directory record Official record
Conditions
Substance-Related Disorders, HIV Infections, Sexually Transmitted Diseases
Interventions
Tri-focal cognitive behavioral therapy - social skills training (CBTSS) counseling program, Standard care
Behavioral
Lead sponsor
University of California, San Diego
Other
Eligibility
18 Years and older
Enrollment
432 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2012
U.S. locations
1
States / cities
San Diego, California
Source: ClinicalTrials.gov public record
Updated Sep 27, 2012 · Synced Jul 22, 2026, 4:59 AM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

A Study Evaluating An Integrated Pharmacy Digital Diary and Delivery Strategy to Increase PrEP Use Among MSM and TGW

NCT05474313
View directory record Official record
Conditions
HIV Prevention, Pre-exposure Prophylaxis (PrEP), Risk Reduction, Adherence, Medication
Interventions
PrEP-3D package, Standard of Care
Behavioral
Lead sponsor
Public Health Foundation Enterprises, Inc.
Other
Eligibility
18 Years and older · Male only
Enrollment
150 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2023
U.S. locations
2
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Sep 20, 2022 · Synced Jul 22, 2026, 4:59 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Reducing Health Problems Associated With Injection Drug Use

NCT01128920
View directory record Official record
Conditions
Intravenous Drug Abuse, HIV Infections
Interventions
Skin and Needle Hygiene Intervention, No intervention - assessment-only condition
Behavioral · Other
Lead sponsor
University of Northern Colorado
Other
Eligibility
18 Years and older
Enrollment
87 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2011
U.S. locations
1
States / cities
Denver, Colorado
Source: ClinicalTrials.gov public record
Updated Jan 3, 2012 · Synced Jul 22, 2026, 4:59 AM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

Kentucky Outreach Service Kiosk (KyOSK): Reducing HIV, HCV, and Overdose Risk

NCT05657106
View directory record Official record
Conditions
Opioid-Related Disorders, Hepatitis C (HCV), Human Immunodeficiency Virus (HIV), Drug Overdose, Substance Abuse, Intravenous Drug Usage, Opiate Substitution Treatment, Sexually Transmitted Diseases
Interventions
Harm reduction kiosk
Behavioral
Lead sponsor
April M Young
Other
Eligibility
18 Years and older
Enrollment
752 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2027
U.S. locations
1
States / cities
Lexington, Kentucky
Source: ClinicalTrials.gov public record
Updated May 5, 2026 · Synced Jul 22, 2026, 4:59 AM EDT
Completed Not applicable Interventional

Specialized Cognitive-Behavioral Counseling Intervention to Reduce HIV Transmission Risk Behavior in HIV-Infected Men

NCT00218712
View directory record Official record
Conditions
HIV Infections
Interventions
Cognitive behavioral intervention, Standard counseling
Behavioral
Lead sponsor
University of California, San Francisco
Other
Eligibility
18 Years and older · Male only
Enrollment
488 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2011
U.S. locations
2
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated May 1, 2012 · Synced Jul 22, 2026, 4:59 AM EDT
Not listed Phase 1 Interventional

Behavioral Activation and HIV Risk Reduction for Men Who Have Sex With Men With Crystal Meth Abuse

NCT01255280
View directory record Official record
Conditions
Crystal Methamphetamine Abuse, Crystal Methamphetamine Dependence
Interventions
Behavioral Activation Therapy and Risk Reduction Counseling (BAT-RR), Information, Motivation, Behavioral skills change approach to sexual risk reduction
Behavioral
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
18 Years and older · Male only
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2013
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated May 31, 2012 · Synced Jul 22, 2026, 4:59 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

HIV Risk Reduction in Youth in the Bahamas

NCT00774592
View directory record Official record
Conditions
HIV Infections
Interventions
FOYC, Goal for it (GFI), Wonderous Wetlands, Caribbean Informed Parents and Children Together (CImPACT), Bahamian Focus on Older Youth (BFOOY), Health and Family Life Curriculum (HFLE)
Behavioral
Lead sponsor
Wayne State University
Other
Eligibility
Not listed
Enrollment
1,360 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2004 – 2016
U.S. locations
1
States / cities
Detroit, Michigan
Source: ClinicalTrials.gov public record
Updated Nov 5, 2017 · Synced Jul 22, 2026, 4:59 AM EDT
Completed Phase 2 Interventional

Brief Introductory Therapy for Opioid Dependence

NCT00406484
View directory record Official record
Conditions
Opiate Dependence, HIV Infections
Interventions
Standard drug counseling, BDRC
Behavioral
Lead sponsor
Yale University
Other
Eligibility
18 Years and older
Enrollment
51 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2010
U.S. locations
2
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Apr 1, 2020 · Synced Jul 22, 2026, 4:59 AM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

First Years Away From Home: Letting Go and Staying Connected

NCT03227809
View directory record Official record
Conditions
Substance Abuse, Risk Reduction, RIsky Sexual Behavior
Interventions
Handbook condition, Handbook plus condition
Behavioral
Lead sponsor
Washington State University
Other
Eligibility
17 Years to 22 Years
Enrollment
910 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2021
U.S. locations
1
States / cities
Pullman, Washington
Source: ClinicalTrials.gov public record
Updated May 18, 2020 · Synced Jul 22, 2026, 4:59 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Risk Reduction Intervention for Vulnerable Young Adult Males

NCT01118416
View directory record Official record
Conditions
Sex, Substance Use, HIV
Interventions
HIV prevention intervention randomized control trial
Behavioral
Lead sponsor
Hunter College of City University of New York
Other
Eligibility
18 Years to 29 Years · Male only
Enrollment
317 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2006 – 2011
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jun 2, 2013 · Synced Jul 22, 2026, 4:59 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

HOME Study: a Combination Support Package to Increase Uptake of PrEP and HIV/STI Testing

NCT03138135
View directory record Official record
Conditions
HIV Prevention, Sexually Transmitted Diseases, Pre-Exposure Prophylaxis
Interventions
HOME Study intervention, Control
Behavioral
Lead sponsor
Public Health Foundation Enterprises, Inc.
Other
Eligibility
18 Years to 35 Years · Male only
Enrollment
104 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2018
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Apr 8, 2021 · Synced Jul 22, 2026, 4:59 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Prevention and Risk: Treatment With a New Emphasis on Relationships

NCT03396367
View directory record Official record
Conditions
Adherence, Medication, Risk Reduction, Drug Use, Sex, Anal, HIV/AIDS
Interventions
PARTNER, Education Intervention
Behavioral
Lead sponsor
Hunter College of City University of New York
Other
Eligibility
18 Years to 29 Years · Male only
Enrollment
196 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2024
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Oct 28, 2025 · Synced Jul 22, 2026, 4:59 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Assessing the Feasibility and Preliminary Impact of a mHealth App on Reducing STI Risk in Black MSM PrEP Users

NCT05395754
View directory record Official record
Conditions
STI, Sexually Transmitted Diseases, Pre-exposure Prophylaxis
Interventions
App Intervention
Device
Lead sponsor
Louisiana State University Health Sciences Center in New Orleans
Other
Eligibility
18 Years to 35 Years · Male only
Enrollment
71 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2024
U.S. locations
2
States / cities
New Orleans, Louisiana
Source: ClinicalTrials.gov public record
Updated Dec 4, 2024 · Synced Jul 22, 2026, 4:59 AM EDT
Terminated Phase 2 Interventional Results available

Efprezimod Alfa (CD24Fc, MK-7110) Administration to Decrease Low-Density Lipoprotein (LDL) and Inflammation in Human Immunodeficiency Virus (HIV) Patients (CALIBER) (MK-7110-003)

NCT03960541
View directory record Official record
Conditions
HIV Infections, Dyslipidemias
Interventions
Efprezimod alfa (human CD24 extracellular domain and human IgG1 Fc fusion protein), Saline Solution
Drug
Lead sponsor
Oncoimmune, Inc., a subsidiary of Merck & Co., Inc. (Rahway, New Jersey USA)
Industry
Eligibility
50 Years and older
Enrollment
8 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2021
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Feb 7, 2023 · Synced Jul 22, 2026, 4:59 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Integrated BA and HIV RR Counseling for MSM With Stimulant Abuse

NCT03175159
View directory record Official record
Conditions
Stimulant Abuse, HIV Prevention, Substance Abuse
Interventions
IMPACT, Standard of Care
Behavioral
Lead sponsor
University of California, Los Angeles
Other
Eligibility
18 Years and older · Male only
Enrollment
205 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2024
U.S. locations
2
States / cities
Miami, Florida • Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jul 24, 2024 · Synced Jul 22, 2026, 4:59 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Young Men's Health Project Targeting HIV Risk Reduction and Substance Abuse

NCT03577301
View directory record Official record
Conditions
HIV Infections
Interventions
Clinic-based Delivery, Remote Delivery, Multi-modal Delivery
Behavioral
Lead sponsor
Florida State University
Other
Eligibility
15 Years to 24 Years · Male only
Enrollment
83 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2022
U.S. locations
3
States / cities
Miami, Florida • Detroit, Michigan • Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Sep 2, 2024 · Synced Jul 22, 2026, 4:59 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Culturally-Tailored HIV Risk Reduction for African-American MSM

NCT00691561
View directory record Official record
Conditions
HIV Infections
Interventions
Project ABLE
Behavioral
Lead sponsor
Medical College of Wisconsin
Other
Eligibility
18 Years and older · Male only
Enrollment
220 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2010
U.S. locations
1
States / cities
Milwaukee, Wisconsin
Source: ClinicalTrials.gov public record
Updated Mar 10, 2010 · Synced Jul 22, 2026, 4:59 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

DOT Diary Optimization Pilot: A Pilot Study to Optimize the DOT Diary App to Measure PrEP Adherence

NCT03387462
View directory record Official record
Conditions
Adherence, Medication, Risk Behavior, Pre-Exposure Prophylaxis, HIV Prevention
Interventions
Emtricitabine / Tenofovir Disoproxil Oral Tablet, DOT Diary mobile app
Drug · Other
Lead sponsor
Public Health Foundation Enterprises, Inc.
Other
Eligibility
18 Years to 35 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018
U.S. locations
2
States / cities
San Francisco, California • Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Oct 26, 2021 · Synced Jul 22, 2026, 4:59 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Linking Lives: Building Quality Parent Components for School-Based Health Programs in Middle Schools

NCT00136279
View directory record Official record
Conditions
Smoking, Sexual Behavior
Interventions
Linking Lives parent-based intervention
Behavioral
Lead sponsor
Centers for Disease Control and Prevention
Federal
Eligibility
Not listed
Enrollment
9,510 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2004 – 2007
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Feb 2, 2009 · Synced Jul 22, 2026, 4:59 AM EDT
Completed Not applicable Interventional Results available

Reducing HIV Risk Among Adolescents: Evaluating HEART for Teens

NCT03453515
View directory record Official record
Conditions
HIV Infections, Sexually Transmitted Diseases
Interventions
HEART, Growing Minds
Behavioral
Lead sponsor
North Carolina State University
Other
Eligibility
14 Years to 18 Years
Enrollment
226 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2019
U.S. locations
1
States / cities
Raleigh, North Carolina
Source: ClinicalTrials.gov public record
Updated Sep 28, 2020 · Synced Jul 22, 2026, 4:59 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Trial of an Adapted STD Screening and Risk Reduction Intervention

NCT02513225
View directory record Official record
Conditions
Alcohol Use, Drug Use, Diagnostic Self Evaluation, Gonorrhea, Unprotected Sex, Chlamydia, Trichomonas
Interventions
Project EMPWR, Optimized Standard Care (OSC)
Behavioral · Other
Lead sponsor
Johns Hopkins Bloomberg School of Public Health
Other
Eligibility
18 Years to 49 Years
Enrollment
350 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2019
U.S. locations
1
States / cities
Fort Apache, Arizona
Source: ClinicalTrials.gov public record
Updated Jul 26, 2023 · Synced Jul 22, 2026, 4:59 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

HORIZONS HIV Intervention

NCT00633906
View directory record Official record
Conditions
HIV Infections, Sexually Transmitted Diseases
Interventions
HORIZONS HIV Intervention, enhanced standard-of-care
Behavioral
Lead sponsor
Emory University
Other
Eligibility
15 Years to 21 Years · Female only
Enrollment
715 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2002 – 2005
U.S. locations
3
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Nov 18, 2013 · Synced Jul 22, 2026, 4:59 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

uSafeUS+ App Pilot Testing

NCT07557745
View directory record Official record
Conditions
Alcohol Consumption, Sexual Assault
Interventions
uSafeUS
Behavioral
Lead sponsor
University of Florida
Other
Eligibility
18 Years to 25 Years
Enrollment
90 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026
U.S. locations
2
States / cities
Gainesville, Florida • Durham, New Hampshire
Source: ClinicalTrials.gov public record
Updated Jun 14, 2026 · Synced Jul 22, 2026, 4:59 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers

An HIV Intervention for Black Men at Risk - The Enhanced Sexual Health Intervention for Men (ES-HIM)

NCT01641146
View directory record Official record
Conditions
HIV, Depression, Posttraumatic Stress Disorder
Interventions
Enhanced Sexual Health Intervention for Men (ES-HIM), Health Promotion (HP) Comparison Arm
Behavioral
Lead sponsor
University of California, Los Angeles
Other
Eligibility
18 Years and older · Male only
Enrollment
118 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2011
U.S. locations
4
States / cities
Inglewood, California • Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Nov 27, 2016 · Synced Jul 22, 2026, 4:59 AM EDT