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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Completed Phase 3 Interventional

Safety Study of AVP-923 in the Treatment of IEED (Involuntary Emotional Expression Disorder) Also Known as Pseudobulbar Affect (Episodes of Uncontrolled Crying and/or Laughter)

NCT00056524
View directory record Official record
Conditions
Alzheimer's Disease, Stroke, Parkinson's Disease, Traumatic Brain Injury
Interventions
AVP-923
Drug
Lead sponsor
Avanir Pharmaceuticals
Industry
Eligibility
18 Years to 80 Years
Enrollment
600 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2007
U.S. locations
39
States / cities
Phoenix, Arizona • La Jolla, California • Los Angeles, California + 31 more
Source: ClinicalTrials.gov public record
Updated Jul 13, 2016 · Synced Sep 18, 2026, 2:22 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Drug-Drug Interaction Study Between EDP-235, Itraconazole, Carbamazepine and Quinidine in Healthy Subjects.

NCT05594602
View directory record Official record
Conditions
COVID-19
Interventions
EDP-235, Itraconazole, Carbamazepine, Quinidine
Drug
Lead sponsor
Enanta Pharmaceuticals, Inc
Industry
Eligibility
18 Years to 55 Years
Enrollment
36 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022
U.S. locations
1
States / cities
Lenexa, Kansas
Source: ClinicalTrials.gov public record
Updated Apr 26, 2023 · Synced Sep 18, 2026, 2:22 PM EDT
Completed Phase 2 Interventional

Efficacy, Safety, and Tolerability Study of AVP-786 as an Adjunctive Therapy in Patients With Major Depressive Disorder With an Inadequate Response to Antidepressant Treatment

NCT02153502
View directory record Official record
Conditions
Depressive Disorder, Treatment-Resistant
Interventions
AVP-786 (d6-dextromethorphan hydrobromide and quinidine sulfate combination), Placebo
Drug
Lead sponsor
Otsuka Pharmaceutical Development & Commercialization, Inc.
Industry
Eligibility
18 Years and older
Enrollment
206 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2016
U.S. locations
32
States / cities
Birmingham, Alabama • Bellflower, California • Costa Mesa, California + 26 more
Source: ClinicalTrials.gov public record
Updated Jul 12, 2026 · Synced Sep 18, 2026, 2:22 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers Results available

A Drug-Drug Interaction Study of Orforglipron (LY3502970) With Quinidine in Healthy Participants

NCT06704763
View directory record Official record
Conditions
Healthy
Interventions
Orforglipron, Midazolam, Quinidine
Drug
Lead sponsor
Eli Lilly and Company
Industry
Eligibility
21 Years to 70 Years
Enrollment
27 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2025
U.S. locations
1
States / cities
Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated May 25, 2026 · Synced Sep 18, 2026, 2:22 PM EDT
Completed Not applicable Interventional Results available

Catheter Ablation vs Anti-arrhythmic Drug Therapy for Atrial Fibrillation Trial

NCT00911508
View directory record Official record
Conditions
Atrial Fibrillation, Arrhythmia
Interventions
Left atrial ablation, Rate or Rhythm Control Therapy
Device · Drug
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years to 90 Years
Enrollment
2,204 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2017
U.S. locations
76
States / cities
Little Rock, Arkansas • Los Angeles, California • Sacramento, California + 66 more
Source: ClinicalTrials.gov public record
Updated Apr 20, 2021 · Synced Sep 18, 2026, 2:22 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Drug-Drug Interaction Study Between EDP-514, Itraconazole, Carbamazepine, and Quinidine in Healthy Subjects

NCT04783753
View directory record Official record
Conditions
Hepatitis B
Interventions
EDP-514, Itraconazole, Carbamazepin, Quinidine
Drug
Lead sponsor
Enanta Pharmaceuticals, Inc
Industry
Eligibility
18 Years to 55 Years
Enrollment
72 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2021
U.S. locations
1
States / cities
Lenexa, Kansas
Source: ClinicalTrials.gov public record
Updated Aug 15, 2021 · Synced Sep 18, 2026, 2:22 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Drug-drug Interaction Study Between EDP-305, Fluconazole and Quinidine in Healthy Volunteers

NCT03610945
View directory record Official record
Conditions
NASH - Nonalcoholic Steatohepatitis
Interventions
Fluconazole, Quinidine, EDP-305
Drug
Lead sponsor
Enanta Pharmaceuticals, Inc
Industry
Eligibility
18 Years to 55 Years
Enrollment
48 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018
U.S. locations
1
States / cities
Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated Dec 4, 2018 · Synced Sep 18, 2026, 2:22 PM EDT
Completed Phase 3 Interventional Accepts healthy volunteers Results available

Evaluating the Efficacy of Dextromethorphan/Quinidine in Treating Irritability in Huntington's Disease

NCT03854019
View directory record Official record
Conditions
Huntington Disease, Irritability
Interventions
Dextromethorphan/quinidine 20mg/10mg (DM/Q 20mg/10mg), Placebo
Drug
Lead sponsor
The University of Texas Health Science Center, Houston
Other
Eligibility
18 Years to 75 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2022
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Jan 4, 2024 · Synced Sep 18, 2026, 2:22 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Study in Healthy Volunteers to Investigate the Effects of Quinidine on the Pharmacokinetics of NKTR-118

NCT01533155
View directory record Official record
Conditions
Drug Induced Constipation
Interventions
Nektar 118, Quinidine, Quinidine placebo, Morphine
Drug
Lead sponsor
AstraZeneca
Industry
Eligibility
18 Years to 55 Years
Enrollment
214 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012
U.S. locations
1
States / cities
Overland Park, Kansas
Source: ClinicalTrials.gov public record
Updated Oct 14, 2014 · Synced Sep 18, 2026, 2:22 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

A Trial to Test the Effects of Other Drugs on SEP-380135 in Healthy Men and Women

NCT07305779
View directory record Official record
Conditions
Schizophrenia
Interventions
SEP-380135, Quinidine Gluconate
Drug
Lead sponsor
Otsuka Pharmaceutical Development & Commercialization, Inc.
Industry
Eligibility
18 Years to 55 Years
Enrollment
12 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025
U.S. locations
1
States / cities
Overland Park, Kansas
Source: ClinicalTrials.gov public record
Updated Jan 14, 2026 · Synced Sep 18, 2026, 2:22 PM EDT
Completed Phase 2 Interventional Results available

Study to Assess the Efficacy, Safety, and Tolerability of AVP-786 for the Treatment of Neurobehavioral Disinhibition Including Aggression, Agitation, and Irritability in Participants With Traumatic Brain Injury

NCT03095066
View directory record Official record
Conditions
Neurobehavioral Disinhibition
Interventions
Placebo, AVP-786-28, AVP-786-42.63
Drug
Lead sponsor
Otsuka Pharmaceutical Development & Commercialization, Inc.
Industry
Eligibility
18 Years to 75 Years
Enrollment
168 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2022
U.S. locations
54
States / cities
Tuscaloosa, Alabama • Phoenix, Arizona • Scottsdale, Arizona + 45 more
Source: ClinicalTrials.gov public record
Updated Oct 28, 2025 · Synced Sep 18, 2026, 2:22 PM EDT
Terminated Phase 3 Interventional Results available

AV Node Ablation and Pacemaker Therapy Compared to Drug Therapy for Atrial Fibrillation - Pilot Study

NCT00589303
View directory record Official record
Conditions
Atrial Fibrillation, Heart Failure
Interventions
FDA approved rate and rhythm control drugs, AV Node ablation and device implant
Drug · Device
Lead sponsor
Mayo Clinic
Other
Eligibility
65 Years and older
Enrollment
27 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2011
U.S. locations
5
States / cities
Scottsdale, Arizona • Evansville, Indiana • Rochester, Minnesota + 2 more
Source: ClinicalTrials.gov public record
Updated Apr 3, 2013 · Synced Sep 18, 2026, 2:22 PM EDT
Completed Phase 3 Interventional

Safety and Efficacy of Dextromethorphan and Quinidine in the Treatment of the Pain of Diabetic Neuropathy

NCT00113620
View directory record Official record
Conditions
Pain, Diabetic Neuropathy
Interventions
Neurodex
Drug
Lead sponsor
Avanir Pharmaceuticals
Industry
Eligibility
18 Years to 80 Years
Enrollment
450 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2007
U.S. locations
44
States / cities
Mesa, Arizona • Sun City, Arizona • Hot Springs, Arkansas + 39 more
Source: ClinicalTrials.gov public record
Updated Jul 13, 2016 · Synced Sep 18, 2026, 2:22 PM EDT
Terminated Phase 2Phase 3 Interventional

Efficacy, Safety, and Tolerability of AVP-786 for the Treatment of Negative Symptoms of Schizophrenia

NCT03896945
View directory record Official record
Conditions
Schizophrenia
Interventions
Placebo, AVP-786
Drug
Lead sponsor
Otsuka Pharmaceutical Development & Commercialization, Inc.
Industry
Eligibility
18 Years to 60 Years
Enrollment
136 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2023
U.S. locations
61
States / cities
Little Rock, Arkansas • Anaheim, California • Bellflower, California + 53 more
Source: ClinicalTrials.gov public record
Updated May 23, 2024 · Synced Sep 18, 2026, 2:22 PM EDT
Completed Phase 3 Interventional Results available

Efficacy, Safety, and Tolerability of AVP-786 for the Treatment of Agitation in Participants With Dementia of the Alzheimer's Type

NCT02442778
View directory record Official record
Conditions
Agitation in Participants With Dementia of the Alzheimer's Type
Interventions
AVP-786-18, Placebo, AVP-786-28, AVP-786-42.63
Drug
Lead sponsor
Otsuka Pharmaceutical Development & Commercialization, Inc.
Industry
Eligibility
50 Years to 90 Years
Enrollment
522 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2019
U.S. locations
79
States / cities
Chandler, Arizona • Tucson, Arizona • Fayetteville, Arkansas + 55 more
Source: ClinicalTrials.gov public record
Updated Sep 8, 2022 · Synced Sep 18, 2026, 2:22 PM EDT
Completed Phase 4 Interventional Results available

Safety, Tolerability and Effectiveness of Nuedexta in the Treatment of Pseudobulbar Affect (PBA)

NCT01799941
View directory record Official record
Conditions
Pseudobulbar Affect (PBA), Stroke, Dementia, Traumatic Brain Injury (TBI)
Interventions
Nuedexta (DM 20 mg/Q 10 mg)
Drug
Lead sponsor
Avanir Pharmaceuticals
Industry
Eligibility
18 Years and older
Enrollment
367 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2015
U.S. locations
1
States / cities
Pensacola, Florida
Source: ClinicalTrials.gov public record
Updated Mar 14, 2017 · Synced Sep 18, 2026, 2:22 PM EDT
Completed Phase 2 Interventional Results available

Safety and Efficacy of AVP-923 in the Treatment of Central Neuropathic Pain in Multiple Sclerosis

NCT01324232
View directory record Official record
Conditions
Central Neuropathic Pain, Multiple Sclerosis
Interventions
AVP-923-45, AVP-923-30, AVP-923-20, Placebo
Drug
Lead sponsor
Avanir Pharmaceuticals
Industry
Eligibility
18 Years to 85 Years
Enrollment
209 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2013
U.S. locations
44
States / cities
Cullman, Alabama • Phoenix, Arizona • Berkeley, California + 40 more
Source: ClinicalTrials.gov public record
Updated Nov 21, 2021 · Synced Sep 18, 2026, 2:22 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Effect of P-glycoprotein Inhibition on Lenalidomide Pharmacokinetics in Healthy Males

NCT01712828
View directory record Official record
Conditions
Healthy
Interventions
Lenalidomide, Quinidine, Temsirolimus, Diphenhydramine
Drug
Lead sponsor
Celgene
Industry
Eligibility
18 Years to 65 Years · Male only
Enrollment
31 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2013
U.S. locations
1
States / cities
Dallas, Texas
Source: ClinicalTrials.gov public record
Updated Nov 7, 2019 · Synced Sep 18, 2026, 2:22 PM EDT
Withdrawn Phase 2Phase 3 Interventional

Empiric Quinidine for Asymptomatic Brugada Syndrome

NCT00789165
View directory record Official record
Conditions
Arrhythmia
Interventions
quinidine, no therapy
Drug
Lead sponsor
International Registry of Asymptomatic Brugada Syndrome
Other
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2020
U.S. locations
1
States / cities
Wynnewood, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Feb 12, 2020 · Synced Sep 18, 2026, 2:22 PM EDT
Completed Phase 1Phase 2 Interventional Results available

Impact of Nuedexta on Bulbar Physiology and Function in ALS

NCT03883581
View directory record Official record
Conditions
Amyotrophic Lateral Sclerosis
Interventions
dextromethorphan HBr and quinidine sulfate
Drug
Lead sponsor
University of Florida
Other
Eligibility
18 Years to 90 Years
Enrollment
28 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2021
U.S. locations
2
States / cities
Fort Lauderdale, Florida • Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated Mar 7, 2023 · Synced Sep 18, 2026, 2:22 PM EDT
Terminated Phase 4 Interventional Results available

Effectiveness, Safety, and Health-Related Outcomes of NUEDEXTA® in Nursing Home Patients With Pseudobulbar Affect (PBA)

NCT02496039
View directory record Official record
Conditions
Pseudobulbar Affect (Involuntary Laughing and/or Crying)
Interventions
NUEDEXTA®
Drug
Lead sponsor
Avanir Pharmaceuticals
Industry
Eligibility
18 Years to 90 Years
Enrollment
5 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2016
U.S. locations
2
States / cities
Miami, Florida • Centerville, Ohio
Source: ClinicalTrials.gov public record
Updated Jul 2, 2017 · Synced Sep 18, 2026, 2:22 PM EDT
Terminated Phase 3 Interventional Results available

Assessment of the Efficacy, Safety, and Tolerability of AVP-786 for the Treatment of Agitation in Patients With Dementia of the Alzheimer's Type

NCT04408755
View directory record Official record
Conditions
Agitation in Patients With Dementia of the Alzheimer's Type
Interventions
AVP-786, Placebo
Drug
Lead sponsor
Otsuka Pharmaceutical Development & Commercialization, Inc.
Industry
Eligibility
50 Years to 90 Years
Enrollment
184 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2024
U.S. locations
45
States / cities
Fort Smith, Arkansas • La Jolla, California • Los Angeles, California + 33 more
Source: ClinicalTrials.gov public record
Updated May 29, 2025 · Synced Sep 18, 2026, 2:22 PM EDT
Completed Phase 2 Interventional Results available

Nuedexta for the Prevention and Modification of Disease Progression in Episodic Migraine

NCT02176018
View directory record Official record
Conditions
Episodic Migraine
Interventions
Dextromethorphan and quinidine, Placebo
Drug
Lead sponsor
Cady, Roger, M.D.
Individual
Eligibility
18 Years to 65 Years
Enrollment
76 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2017
U.S. locations
5
States / cities
Rockford, Illinois • Ridgeland, Mississippi • City of Saint Peters, Missouri + 2 more
Source: ClinicalTrials.gov public record
Updated Apr 2, 2018 · Synced Sep 18, 2026, 2:22 PM EDT
Completed Phase 3 Interventional Results available

Efficacy, Safety and Tolerability of AVP-786 for the Treatment of Agitation in Patients With Dementia of the Alzheimer's Type

NCT02442765
View directory record Official record
Conditions
Agitation in Patients With Dementia of the Alzheimer's Type
Interventions
AVP-786, Placebo
Drug
Lead sponsor
Otsuka Pharmaceutical Development & Commercialization, Inc.
Industry
Eligibility
50 Years to 90 Years
Enrollment
387 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2019
U.S. locations
111
States / cities
Phoenix, Arizona • Scottsdale, Arizona • Little Rock, Arkansas + 78 more
Source: ClinicalTrials.gov public record
Updated Feb 12, 2023 · Synced Sep 18, 2026, 2:22 PM EDT