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Showing 1–24 of 103 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Efavirenz (EFV) Clear all
Completed Phase 1 Interventional Accepts healthy volunteers

Drug Interaction - Oral Contraceptive

NCT00399685
View directory record Official record
Conditions
HIV Infections
Interventions
Ortho Tri-Cyclen LO, Ortho Cyclen, Ortho Cyclen + Efavirenz
Drug
Lead sponsor
Bristol-Myers Squibb
Industry
Eligibility
18 Years to 45 Years · Female only
Enrollment
28 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2006 – 2007
U.S. locations
2
States / cities
San Diego, California • Tacoma, Washington
Source: ClinicalTrials.gov public record
Updated Apr 13, 2011 · Synced Sep 28, 2026, 5:57 PM EDT
Completed Phase 3 Interventional Results available

Efavirenz or Atazanavir/Ritonavir Given With Emtricitabine/Tenofovir Disoproxil Fumarate or Abacavir/Lamivudine in HIV Infected Treatment-Naive Adults

NCT00118898
View directory record Official record
Conditions
HIV Infections
Interventions
Abacavir/Lamivudine, Atazanavir, Efavirenz, Emtricitabine/Tenofovir disoproxil fumarate, Ritonavir, Abacavir/Lamivudine placebo, Emtricitabine/Tenofovir disoproxil fumarate placebo
Drug
Lead sponsor
Advancing Clinical Therapeutics Globally for HIV/AIDS and Other Infections
Network
Eligibility
16 Years and older
Enrollment
1,864 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2009
U.S. locations
51
States / cities
Los Angeles, California • Palo Alto, California • San Diego, California + 30 more
Source: ClinicalTrials.gov public record
Updated Oct 11, 2018 · Synced Sep 28, 2026, 5:57 PM EDT
Completed Not applicable Interventional Results available

Advanced Neuroimaging Evaluation of CNS Changes Associated With Efavirenz Therapy Switch to an Raltegravir-based Regimen

NCT01978743
View directory record Official record
Conditions
HIV, HIV-associated Neurocognitive Disorder, Neurotoxicity
Interventions
Raltegravir
Drug
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
18 Years to 65 Years
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2017
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jul 25, 2017 · Synced Sep 28, 2026, 5:57 PM EDT
Completed Phase 1Phase 2 Interventional Results available

Safety and Effectiveness of Emtricitabine, Efavirenz, and Didanosine in HIV Infected Children Who Have Taken Few or No Anti-HIV Drugs

NCT00016718
View directory record Official record
Conditions
HIV Infections
Interventions
Didanosine (ddI), Efavirenz (EFV), Emtricitabine (FTC)
Drug
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
90 Days to 21 Years
Enrollment
43 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2001 – 2009
U.S. locations
16
States / cities
San Diego, California • San Francisco, California • Aurora, Colorado + 11 more
Source: ClinicalTrials.gov public record
Updated Nov 4, 2021 · Synced Sep 28, 2026, 5:57 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Drug Interactions of Amprenavir and Efavirenz, in Combination With a Second Protease Inhibitor, in HIV-Negative Volunteers

NCT00005762
View directory record Official record
Conditions
HIV Infections
Interventions
Indinavir sulfate, Ritonavir, Amprenavir, Nelfinavir mesylate, Efavirenz, Saquinavir
Drug
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 65 Years
Enrollment
90 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2001 – 2004
U.S. locations
8
States / cities
Palo Alto, California • Aurora, Colorado • Honolulu, Hawaii + 5 more
Source: ClinicalTrials.gov public record
Updated Oct 31, 2021 · Synced Sep 28, 2026, 5:57 PM EDT
Completed Phase 2 Interventional

A Study to Demonstrate That Anti-HIV Drug Therapy Can be Stopped Without Causing Viral Resistance, and to Characterize Drug Elimination From the Body

NCT00029341
View directory record Official record
Conditions
HIV Infections
Interventions
Treatment Interruption
Behavioral
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years and older
Enrollment
36 participants
Healthy volunteers
Healthy volunteers not accepted
U.S. locations
7
States / cities
San Francisco, California • Denver, Colorado • Cincinnati, Ohio + 2 more
Source: ClinicalTrials.gov public record
Updated Jul 29, 2008 · Synced Sep 28, 2026, 5:57 PM EDT
Completed Phase 2Phase 3 Interventional Results available

Study To Evaluate Emtricitabine/Tenofovir Alafenamide (F/TAF) in Human Immunodeficiency Virus 1 (HIV-1) Infected Children and Adolescents Virologically Suppressed on a 2-Nucleoside/Nucleotide Reverse Transcriptase Inhibitor (2-NRTI)-Containing Regimen

NCT02285114
View directory record Official record
Conditions
HIV-1
Interventions
F/TAF, 3rd ARV agent, Boosted PIs
Drug
Lead sponsor
Gilead Sciences
Industry
Eligibility
1 Month to 17 Years
Enrollment
41 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2024
U.S. locations
4
States / cities
Los Angeles, California • Aurora, Colorado • Philadelphia, Pennsylvania + 1 more
Source: ClinicalTrials.gov public record
Updated Jun 26, 2025 · Synced Sep 28, 2026, 5:57 PM EDT
Not listed Phase 2Phase 3 Interventional

BREATHER (PENTA 16) Short-Cycle Therapy (SCT) (5 Days on/2 Days Off) in Young People With Chronic HIV-infection

NCT01641016
View directory record Official record
Conditions
HIV
Interventions
efavirenz
Drug
Lead sponsor
PENTA Foundation
Network
Eligibility
8 Years to 24 Years
Enrollment
160 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2016
U.S. locations
1
States / cities
Memphis, Tennessee
Source: ClinicalTrials.gov public record
Updated Mar 1, 2015 · Synced Sep 28, 2026, 5:57 PM EDT
Completed Phase 1Phase 2 Interventional

Blood Levels of Anti-HIV Drugs Used in Combination Regimens in HIV Infected Children

NCT00260078
View directory record Official record
Conditions
HIV Infections
Interventions
Atazanavir, Darunavir, Efavirenz, Nevirapine, Ritonavir, Tenofovir disoproxil fumarate, Pharmacokinetic Study
Drug · Procedure
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
8 Years to 17 Years
Enrollment
75 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2009
U.S. locations
21
States / cities
Alhambra, California • La Jolla, California • Long Beach, California + 16 more
Source: ClinicalTrials.gov public record
Updated Nov 8, 2021 · Synced Sep 28, 2026, 5:57 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Study to Determine the Effect of Efavirenz on the ECG QTcF Interval in Healthy Subjects

NCT02164812
View directory record Official record
Conditions
HIV/AIDS
Interventions
Moxifloxacin, Placebo, Efavirenz
Drug
Lead sponsor
Bristol-Myers Squibb
Industry
Eligibility
18 Years to 49 Years
Enrollment
58 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2015
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Sep 6, 2015 · Synced Sep 28, 2026, 5:57 PM EDT
Completed Phase 4 Interventional Results available

Evaluating the Response to Two Antiretroviral Medication Regimens in HIV-Infected Pregnant Women, Who Begin Antiretroviral Therapy Between 20 and 36 Weeks of Pregnancy, for the Prevention of Mother-to-Child Transmission

NCT01618305
View directory record Official record
Conditions
HIV Infections
Interventions
Lamivudine/zidovudine, Efavirenz, Raltegravir
Drug
Lead sponsor
Westat
Other
Eligibility
16 Years and older · Female only
Enrollment
408 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2018
U.S. locations
4
States / cities
Fort Lauderdale, Florida • New Orleans, Louisiana • Memphis, Tennessee + 1 more
Source: ClinicalTrials.gov public record
Updated Jan 29, 2020 · Synced Sep 28, 2026, 5:57 PM EDT
Completed Phase 2 Interventional

A Study of Abacavir Plus Indinavir Sulfate Plus Efavirenz in HIV-Infected Patients

NCT00001086
View directory record Official record
Conditions
HIV Infections
Interventions
Indinavir sulfate, Abacavir sulfate, Efavirenz
Drug
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
16 Years and older
Enrollment
300 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Ends 1999
U.S. locations
55
States / cities
Los Angeles, California • San Francisco, California • Stanford, California + 32 more
Source: ClinicalTrials.gov public record
Updated Oct 31, 2021 · Synced Sep 28, 2026, 5:57 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Effects of CYP2B6 Genetic Polymorphisms on Efavirenz Pharmacokinetics

NCT00668395
View directory record Official record
Conditions
HIV
Interventions
Efavirenz
Drug
Lead sponsor
Indiana University
Other
Eligibility
18 Years to 49 Years
Enrollment
73 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2010
U.S. locations
2
States / cities
Indianapolis, Indiana
Source: ClinicalTrials.gov public record
Updated Sep 25, 2014 · Synced Sep 28, 2026, 5:57 PM EDT
Terminated Phase 4 Interventional Accepts healthy volunteers Results available

Pharmacokinetics and Pharmacodynamics of the Etonogestrel Contraceptive Implant When Co-administered With Efavirenz

NCT01980342
View directory record Official record
Conditions
Drug Interaction
Interventions
Efavirenz
Drug
Lead sponsor
Johns Hopkins University
Other
Eligibility
18 Years to 40 Years · Female only
Enrollment
1 participant
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2018
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated May 10, 2018 · Synced Sep 28, 2026, 5:57 PM EDT
Completed No phase listed Observational

Sex, Aging and Antiretroviral Pharmacokinetics

NCT00666055
View directory record Official record
Conditions
HIV Infections
Interventions
ARV regimen chosen by treating physician
Drug
Lead sponsor
Kristine Patterson, MD
Other
Eligibility
19 Years and older · Female only
Enrollment
11 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2012
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Sep 19, 2012 · Synced Sep 28, 2026, 5:57 PM EDT
Completed Phase 4 Interventional Results available

HIV Treatment Reinitiation in Women Who Received Anti-HIV Drugs to Prevent Mother-to-Child Transmission of HIV

NCT00442962
View directory record Official record
Conditions
HIV Infections
Interventions
Efavirenz, Emtricitabine/Tenofovir disoproxil fumarate
Drug
Lead sponsor
Advancing Clinical Therapeutics Globally for HIV/AIDS and Other Infections
Network
Eligibility
16 Years and older · Female only
Enrollment
54 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2010
U.S. locations
6
States / cities
San Diego, California • Boston, Massachusetts • St Louis, Missouri + 3 more
Source: ClinicalTrials.gov public record
Updated Oct 11, 2018 · Synced Sep 28, 2026, 5:57 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers Results available

A Drug-Drug Interaction Study Between Fenofibric Acid and Efavirenz

NCT01472380
View directory record Official record
Conditions
Healthy
Interventions
efavirenz, fenofibric acid 105 mg
Drug
Lead sponsor
Mutual Pharmaceutical Company, Inc.
Industry
Eligibility
18 Years to 45 Years
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2012
U.S. locations
1
States / cities
Morgantown, West Virginia
Source: ClinicalTrials.gov public record
Updated Jul 31, 2012 · Synced Sep 28, 2026, 5:57 PM EDT
Completed Phase 4 Interventional Results available

Prospective Evaluation of Anti-retroviral Combinations for Treatment Naive, HIV Infected Persons in Resource-limited Settings

NCT00084136
View directory record Official record
Conditions
HIV Infections
Interventions
Atazanavir, Didanosine (enteric-coated), Efavirenz, Emtricitabine, Emtricitabine/Tenofovir disoproxil fumarate, Lamivudine/Zidovudine
Drug
Lead sponsor
Advancing Clinical Therapeutics Globally for HIV/AIDS and Other Infections
Network
Eligibility
18 Years and older
Enrollment
1,571 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2010
U.S. locations
27
States / cities
Los Angeles, California • Torrance, California • Denver, Colorado + 16 more
Source: ClinicalTrials.gov public record
Updated Oct 9, 2018 · Synced Sep 28, 2026, 5:57 PM EDT
Completed Phase 2 Interventional Results available

Raltegravir + Lopinavir/Ritonavir Versus Efavirenz + Tenofovir + Emtricitabine in Treatment Naive Patients

NCT00752856
View directory record Official record
Conditions
HIV Infections
Interventions
Kaletra + Isentress, Atripla
Drug
Lead sponsor
University of California, San Diego
Other
Eligibility
18 Years and older
Enrollment
51 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2014
U.S. locations
6
States / cities
Long Beach, California • Los Angeles, California • Orange, California + 3 more
Source: ClinicalTrials.gov public record
Updated Jul 21, 2020 · Synced Sep 28, 2026, 5:57 PM EDT
Completed Phase 2 Interventional

The Safety and Effectiveness of 1592U89 Plus 141W94 Plus DMP 266 in Patients With HIV Who Developed a Resistance to Protease Inhibitors

NCT00002213
View directory record Official record
Conditions
HIV Infections
Interventions
Abacavir sulfate, Amprenavir, Efavirenz
Drug
Lead sponsor
Glaxo Wellcome
Industry
Eligibility
13 Years and older
Enrollment
80 participants
Healthy volunteers
Healthy volunteers not accepted
U.S. locations
9
States / cities
Berkeley, California • Los Angeles, California • Chicago, Illinois + 6 more
Source: ClinicalTrials.gov public record
Updated Jun 23, 2005 · Synced Sep 28, 2026, 5:57 PM EDT
Completed Phase 2 Interventional

Continued Antiretroviral Therapy With Abacavir, Amprenavir and Efavirenz

NCT00001758
View directory record Official record
Conditions
HIV Infection
Interventions
Abacavir, Amprenavir, Efavirenz
Drug
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
Not listed
Enrollment
25 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1997 – 2003
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Mar 3, 2008 · Synced Sep 28, 2026, 5:57 PM EDT
Completed Phase 3 Interventional

A Pilot Study of Atazanavir/Ritonavir/Efavirenz as a Nucleoside Sparing Regimen

NCT00135343
View directory record Official record
Conditions
HIV Infections
Interventions
Atazanvir/ritonavir + efavirenz
Drug
Lead sponsor
Bristol-Myers Squibb
Industry
Eligibility
18 Years and older
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2005
U.S. locations
15
States / cities
San Francisco, California • Washington D.C., District of Columbia • Atlantis, Florida + 12 more
Source: ClinicalTrials.gov public record
Updated Apr 13, 2011 · Synced Sep 28, 2026, 5:57 PM EDT
Completed Phase 3 Interventional Results available

Safety and Efficacy of Switching From Regimens of ABC/3TC + a 3rd Agent to E/C/F/TAF Fixed-Dose Combination (FDC) in Virologically-Suppressed HIV 1 Infected Adults

NCT02605954
View directory record Official record
Conditions
HIV-1 Infection
Interventions
E/C/F/TAF, ABC/3TC, Third Antiretroviral Agent
Drug
Lead sponsor
Gilead Sciences
Industry
Eligibility
18 Years and older
Enrollment
275 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2018
U.S. locations
12
States / cities
Phoenix, Arizona • Los Angeles, California • Washington D.C., District of Columbia + 8 more
Source: ClinicalTrials.gov public record
Updated Nov 13, 2018 · Synced Sep 28, 2026, 5:57 PM EDT
Completed Phase 1 Interventional

Efavirenz for Patients With Alzheimer's Disease

NCT03706885
View directory record Official record
Conditions
Alzheimer Disease, Early Onset
Interventions
Sustiva Pill
Drug
Lead sponsor
Case Western Reserve University
Other
Eligibility
55 Years to 85 Years
Enrollment
5 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2022
U.S. locations
1
States / cities
Beachwood, Ohio
Source: ClinicalTrials.gov public record
Updated Feb 14, 2023 · Synced Sep 28, 2026, 5:57 PM EDT