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ClinicalTrials.gov public records Last synced Oct 9, 2026, 8:54 AM EDT

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Showing 1–24 of 50 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: Placebo and Paroxetine Clear all
Completed Phase 2 Interventional Results available

Study of the Safety and Efficacy of OPC-34712 as Adjunctive Therapy in the Treatment of Patients With Major Depressive Disorder

NCT00797966
View directory record Official record
Conditions
Major Depressive Disorder
Interventions
OPC-34712, Placebo, ADT
Drug
Lead sponsor
Otsuka Pharmaceutical Development & Commercialization, Inc.
Industry
Eligibility
18 Years to 65 Years
Enrollment
850 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2010
U.S. locations
50
States / cities
Arcadia, California • Beverly Hills, California • Escondido, California + 43 more
Source: ClinicalTrials.gov public record
Updated Feb 29, 2016 · Synced Oct 9, 2026, 8:54 AM EDT
Terminated Phase 3 Interventional

A 10-week Study Evaluating the Efficacy and Safety of PD 0332334 for the Treatment of Generalized Anxiety Disorder (3)

NCT00658762
View directory record Official record
Conditions
Generalized Anxiety Disorder
Interventions
PD 0332334, paroxetine, Placebo
Drug
Lead sponsor
Pfizer
Industry
Eligibility
18 Years to 65 Years
Enrollment
286 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2009
U.S. locations
27
States / cities
Birmingham, Alabama • Glendale, California • Orange, California + 22 more
Source: ClinicalTrials.gov public record
Updated Nov 16, 2012 · Synced Oct 9, 2026, 8:54 AM EDT
Completed Phase 2 Interventional

Treatment Of Patients With Social Anxiety Disorder

NCT00397722
View directory record Official record
Conditions
Social Phobia
Interventions
GW876008, paroxetine
Drug
Lead sponsor
GlaxoSmithKline
Industry
Eligibility
18 Years to 64 Years
Enrollment
299 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2007
U.S. locations
12
States / cities
Beverly Hills, California • Burbank, California • Temecula, California + 9 more
Source: ClinicalTrials.gov public record
Updated Jul 11, 2017 · Synced Oct 9, 2026, 8:54 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Effect of Paroxetine on Smokers' Cardiovascular Response to Stress - 1

NCT00218439
View directory record Official record
Conditions
Tobacco Use Disorder
Interventions
Paroxetine, Placebo
Drug
Lead sponsor
University of Minnesota
Other
Eligibility
18 Years to 65 Years
Enrollment
105 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2005 – 2010
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated Nov 1, 2019 · Synced Oct 9, 2026, 8:54 AM EDT
Completed Phase 3 Interventional

An Eight-week Study of Saredutant and Paroxetine as Combination Treatment for Major Depressive Disorder

NCT00629551
View directory record Official record
Conditions
Depressive Disorder, Major
Interventions
saredutant (SR48968), paroxetine, placebo
Drug
Lead sponsor
Sanofi
Industry
Eligibility
18 Years to 65 Years
Enrollment
825 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2009
U.S. locations
1
States / cities
Bridgewater, New Jersey
Source: ClinicalTrials.gov public record
Updated May 26, 2016 · Synced Oct 9, 2026, 8:54 AM EDT
Completed Phase 2 Interventional Results available

A Study to Compare the Efficacy, Safety, and Tolerability of JNJ-42847922 Versus Quetiapine Extended-Release as Adjunctive Therapy to Antidepressants in Adult Participants With Major Depressive Disorder Who Have Responded Inadequately to Antidepressant Therapy

NCT03321526
View directory record Official record
Conditions
Depressive Disorder, Major
Interventions
JNJ-42847922, Placebo Matching to JNJ-42847922, Quetiapine XR, Placebo Matching to Quetiapine XR, Selective Serotonin Reuptake Inhibitor (SSRI), Serotonin-Norepinephrine Reuptake Inhibitor (SNRI)
Drug
Lead sponsor
Janssen Research & Development, LLC
Industry
Eligibility
18 Years to 70 Years
Enrollment
107 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2019
U.S. locations
50
States / cities
Phoenix, Arizona • Tempe, Arizona • Rogers, Arkansas + 41 more
Source: ClinicalTrials.gov public record
Updated Apr 29, 2025 · Synced Oct 9, 2026, 8:54 AM EDT
Completed Phase 3 Interventional Results available

Study of Antidepressants in Parkinson's Disease

NCT00086190
View directory record Official record
Conditions
Parkinson Disease, Depression
Interventions
paroxetine, venlafaxine, placebo
Drug · Other
Lead sponsor
University of Rochester
Other
Eligibility
30 Years and older
Enrollment
115 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2009
U.S. locations
15
States / cities
San Francisco, California • Gainesville, Florida • Miami, Florida + 11 more
Source: ClinicalTrials.gov public record
Updated Jan 4, 2013 · Synced Oct 9, 2026, 8:54 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers Results available

Clinical Study to Investigate the Effect of the Combination of Psychotropic Drugs and an Opioid on Ventilation

NCT04310579
View directory record Official record
Conditions
Hypercapnia, Ventilatory Depression
Interventions
Oxycodone and Midazolam, Oxycodone, Paroxetine, and Quetiapine
Drug
Lead sponsor
Food and Drug Administration (FDA)
Federal
Eligibility
18 Years to 50 Years
Enrollment
55 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2021
U.S. locations
1
States / cities
West Bend, Wisconsin
Source: ClinicalTrials.gov public record
Updated May 21, 2024 · Synced Oct 9, 2026, 8:54 AM EDT
Completed Phase 3 Interventional Results available

Brexpiprazole as Adjunctive Treatment in Patients With Major Depressive Disorder With an Inadequate Response to Antidepressant Treatment

NCT01838681
View directory record Official record
Conditions
Major Depressive Disorder
Interventions
Placebo, Brexpiprazole, ADT
Drug
Lead sponsor
H. Lundbeck A/S
Industry
Eligibility
18 Years to 75 Years
Enrollment
1,986 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2016
U.S. locations
8
States / cities
Little Rock, Arkansas • Cerritos, California • Temecula, California + 4 more
Source: ClinicalTrials.gov public record
Updated Aug 9, 2017 · Synced Oct 9, 2026, 8:54 AM EDT
Completed Phase 4 Interventional Results available

Treatment of Tinnitus With Migraine Medications

NCT04404439
View directory record Official record
Conditions
Tinnitus, Subjective, Tinnitus
Interventions
Nortriptyline + Topiramate, Verapamil + Paroxetine, Placebo
Drug
Lead sponsor
University of California, Irvine
Other
Eligibility
25 Years to 85 Years
Enrollment
78 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2023
U.S. locations
1
States / cities
Orange, California
Source: ClinicalTrials.gov public record
Updated Apr 16, 2026 · Synced Oct 9, 2026, 8:54 AM EDT
Withdrawn Phase 2 Interventional

Pharmacogenetic Clinical Trial of Nepicastat for Post Traumatic Stress Disorder (PTSD)

NCT00641511
View directory record Official record
Conditions
Post Traumatic Stress Disorder (PTSD)
Interventions
SYN117 (nepicastat), Placebo comparator
Drug
Lead sponsor
Michael E. DeBakey VA Medical Center
Federal
Eligibility
18 Years to 65 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2009
U.S. locations
3
States / cities
Tuscaloosa, Alabama • Charleston, South Carolina • Houston, Texas
Source: ClinicalTrials.gov public record
Updated Aug 21, 2019 · Synced Oct 9, 2026, 8:54 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Effects of MNTX on CYP450 2D6 in Metabolizers of Dextromethorphan

NCT01367535
View directory record Official record
Conditions
Healthy Adults
Interventions
SC Methylnaltrexone (MNTX), IV Methylnaltrexone (MNTX), Oral Paroxetine, SC Placebo
Drug
Lead sponsor
Bausch Health Americas, Inc.
Industry
Eligibility
18 Years to 55 Years · Male only
Enrollment
54 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2006
U.S. locations
1
States / cities
Tarrytown, New York
Source: ClinicalTrials.gov public record
Updated Nov 27, 2019 · Synced Oct 9, 2026, 8:54 AM EDT
Terminated Phase 3 Interventional

A 10-week Study Evaluating the Efficacy and Safety of PD 0332334 in Patients With Generalized Anxiety Disorder (2)

NCT00658372
View directory record Official record
Conditions
Generalized Anxiety Disorder
Interventions
PD 0332334, Paroxetine, Placebo
Drug
Lead sponsor
Pfizer
Industry
Eligibility
18 Years to 65 Years
Enrollment
360 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2009
U.S. locations
29
States / cities
Arcadia, California • Costa Mesa, California • Escondido, California + 25 more
Source: ClinicalTrials.gov public record
Updated Nov 16, 2012 · Synced Oct 9, 2026, 8:54 AM EDT
Completed Phase 4 Interventional Results available

Combination Treatment for Posttraumatic Stress Disorder (PTSD) After the World Trade Center (WTC) Attack

NCT01130103
View directory record Official record
Conditions
Posttraumatic Stress Disorder
Interventions
Paroxetine, Prolonged Exposure Therapy
Drug · Behavioral
Lead sponsor
Research Foundation for Mental Hygiene, Inc.
Other
Eligibility
18 Years to 70 Years
Enrollment
37 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2010
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Dec 4, 2012 · Synced Oct 9, 2026, 8:54 AM EDT
Completed Phase 2 Interventional Results available

Eight-Week Efficacy & Safety Study of Brisdelle™ (Formerly Known as Mesafem) in the Treatment of Vasomotor Symptoms Associated With Menopause

NCT00786188
View directory record Official record
Conditions
Hot Flashes
Interventions
Brisdelle (paroxetine mesylate), Sugar pill
Drug
Lead sponsor
Noven Therapeutics
Industry
Eligibility
41 Years and older · Female only
Enrollment
102 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2009
U.S. locations
10
States / cities
Lake Worth, Florida • Naples, Florida • Greensboro, North Carolina + 6 more
Source: ClinicalTrials.gov public record
Updated Oct 15, 2015 · Synced Oct 9, 2026, 8:54 AM EDT
Completed Phase 2 Interventional

An Eight-week Study Evaluating the Efficacy and Tolerability of Two Doses of SSR149415 in Outpatients With Generalized Anxiety Disorder

NCT00374166
View directory record Official record
Conditions
Anxiety Disorders
Interventions
SSR149415, Placebo, Paroxetine
Drug
Lead sponsor
Sanofi
Industry
Eligibility
18 Years to 64 Years
Enrollment
325 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2008
U.S. locations
1
States / cities
Bridgewater, New Jersey
Source: ClinicalTrials.gov public record
Updated May 25, 2016 · Synced Oct 9, 2026, 8:54 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Omnitram Pharmacokinetic and Analgesic Study Following CY2D6 Inhibition With Paroxetine In Healthy Volunteers

NCT03312777
View directory record Official record
Conditions
Pain
Interventions
Omnitram, Tramadol, Placebo
Drug
Lead sponsor
Syntrix Biosystems, Inc.
Industry
Eligibility
18 Years to 50 Years
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017
U.S. locations
1
States / cities
Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated Dec 28, 2017 · Synced Oct 9, 2026, 8:54 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Neural Circuits in Women With Abuse and Posttraumatic Stress Disorder

NCT01681849
View directory record Official record
Conditions
PTSD
Interventions
Placebo, Paroxetine, Positron Emission Tomography (PET) Imaging
Drug · Other
Lead sponsor
Emory University
Other
Eligibility
18 Years to 75 Years · Female only
Enrollment
91 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2015
U.S. locations
1
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Jun 28, 2017 · Synced Oct 9, 2026, 8:54 AM EDT
Completed Phase 4 Interventional Results available

Combination of Paroxetine CR and Quetiapine for the Treatment of Refractory Generalized Anxiety Disorder

NCT00113295
View directory record Official record
Conditions
Anxiety Disorder
Interventions
Continued Paroxetine CR, Quetiapine, Placebo
Drug
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
18 Years to 72 Years
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2007
U.S. locations
2
States / cities
Boston, Massachusetts • Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Apr 23, 2014 · Synced Oct 9, 2026, 8:54 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Effect of Vortioxetine, Paroxetine, and Placebo on Sexual Functioning in Healthy Volunteers

NCT02932904
View directory record Official record
Conditions
Healthy Volunteers
Interventions
Vortioxetine, Paroxetine, Placebo
Drug
Lead sponsor
Takeda
Industry
Eligibility
18 Years to 40 Years
Enrollment
361 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2017
U.S. locations
15
States / cities
Encino, California • Long Beach, California • Torrance, California + 12 more
Source: ClinicalTrials.gov public record
Updated Sep 14, 2018 · Synced Oct 9, 2026, 8:54 AM EDT
Withdrawn Phase 2 Interventional

A Study To Assess Adverse Events and Change in Disease Activity With Oral Cariprazine When Added to Antidepressant Therapies (ADTs) Compared to Placebo in Adult Participants With Generalized Anxiety Disorder (GAD) Who Have Had an Inadequate Response to ADTs Alone

NCT04965272
View directory record Official record
Conditions
Generalized Anxiety Disorder
Interventions
Cariprazine 0.75 mg/day, Cariprazine 1.5 mg/day, Cariprazine 3.0 mg/day, Placebo
Drug · Other
Lead sponsor
AbbVie
Industry
Eligibility
18 Years to 65 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021
U.S. locations
36
States / cities
Little Rock, Arkansas • Colton, California • Costa Mesa, California + 29 more
Source: ClinicalTrials.gov public record
Updated Apr 12, 2022 · Synced Oct 9, 2026, 8:54 AM EDT
Completed Not applicable Interventional

Clinical Study Assessing a New Scale to Measure Onset of Action in Generalized Anxiety Disorder

NCT00715039
View directory record Official record
Conditions
Anxiety Disorders
Interventions
lorazepam, placebo, paroxetine
Drug
Lead sponsor
Pfizer
Industry
Eligibility
18 Years to 65 Years
Enrollment
169 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2004
U.S. locations
15
States / cities
Glendale, California • Northridge, California • Orange, California + 10 more
Source: ClinicalTrials.gov public record
Updated Oct 3, 2008 · Synced Oct 9, 2026, 8:54 AM EDT
Completed Phase 2 Interventional

Comparison of LY686017 With a Marketed Drug in the Treatment of Social Anxiety Disorder

NCT00191022
View directory record Official record
Conditions
Social Phobia
Interventions
LY686017, paroxetine, placebo
Drug
Lead sponsor
Eli Lilly and Company
Industry
Eligibility
18 Years to 65 Years
Enrollment
185 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2007
U.S. locations
15
States / cities
Burbank, California • Newport Beach, California • Denver, Colorado + 12 more
Source: ClinicalTrials.gov public record
Updated Feb 13, 2007 · Synced Oct 9, 2026, 8:54 AM EDT
Completed Not applicable Interventional

Lamotrigine Augmentation in Resistant Depression

NCT00901407
View directory record Official record
Conditions
Unipolar Depression
Interventions
lamotrigine, placebo, paroxetine
Drug
Lead sponsor
Louisiana State University Health Sciences Center in New Orleans
Other
Eligibility
18 Years to 65 Years
Enrollment
138 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2007
U.S. locations
1
States / cities
New Orleans, Louisiana
Source: ClinicalTrials.gov public record
Updated May 13, 2009 · Synced Oct 9, 2026, 8:54 AM EDT