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ClinicalTrials.gov public records Last synced Sep 8, 2026, 11:05 PM EDT

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Showing 1–24 of 30 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Dextromethorphan 30 mg Clear all
Completed Phase 4 Interventional Results available

Antitussive Effect of a Naturally Flavored Syrup Containing Diphenhydramine, Compared With Dextromethorphan and Placebo

NCT02062710
View directory record Official record
Conditions
Cough Reflex Sensitivity
Interventions
diphenhydramine/phenylephrine/cocoa; dextromethorophan; placebo, diphenhydramine/phenylephrine/cocoa; placebo; dextromethorphan, dextromethorphan; diphenhydramine/phenylephrine/cocoa; placebo, dextromethorophan; placebo; diphenhydramine/phenylephrine/cocoa, placebo; diphenhydramine/phenylephrine/cocoa; dextromethorphan, placebo; dextromethorphan; diphenhydramine/phenylephrine/cocoa
Drug
Lead sponsor
Montefiore Medical Center
Other
Eligibility
18 Years and older
Enrollment
22 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014
U.S. locations
1
States / cities
The Bronx, New York
Source: ClinicalTrials.gov public record
Updated Feb 27, 2018 · Synced Sep 8, 2026, 11:05 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Pharmacokinetic Drug Interactions of AEGR-733 on Lipid-lowering Agents

NCT00359281
View directory record Official record
Conditions
Healthy
Interventions
atorvastatin, simvastatin, ezetimibe, fenofibrate, dextromethorphan, Extended Release Niacin
Drug
Lead sponsor
Aegerion Pharmaceuticals, Inc.
Industry
Eligibility
18 Years to 70 Years
Enrollment
125 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2006 – 2007
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Feb 22, 2018 · Synced Sep 8, 2026, 11:05 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers Results available

A Study of Imlunestrant (LY3484356) in Female Healthy Participants

NCT05444556
View directory record Official record
Conditions
Healthy
Interventions
Imlunestrant, Repaglinide, Omeprazole, Dextromethorphan, Quinidine, Rosuvastatin, Digoxin
Drug
Lead sponsor
Eli Lilly and Company
Industry
Eligibility
18 Years to 65 Years · Female only
Enrollment
113 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022
U.S. locations
3
States / cities
Cypress, California • South Miami, Florida • San Antonio, Texas
Source: ClinicalTrials.gov public record
Updated Dec 11, 2025 · Synced Sep 8, 2026, 11:05 PM EDT
Completed Phase 1 Interventional Results available

Pharmacokinetic Drug-drug Interaction Study of Encorafenib and Binimetinib on Probe Drugs in Patients With BRAF V600-mutant Melanoma or Other Advanced Solid Tumors

NCT03864042
View directory record Official record
Conditions
Advanced Solid Tumors, Metastatic Melanoma
Interventions
losartan, dextromethorphan, caffeine, omeprazole, midazolam, rosuvastatin, bupropion immediate release (IR), encorafenib, binimetinib, modafinil
Drug
Lead sponsor
Pfizer
Industry
Eligibility
18 Years and older
Enrollment
56 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2023
U.S. locations
11
States / cities
Orange, California • Aurora, Colorado • Chicago, Illinois + 7 more
Source: ClinicalTrials.gov public record
Updated Sep 26, 2024 · Synced Sep 8, 2026, 11:05 PM EDT
Completed Early Phase 1 Interventional Accepts healthy volunteers

Bupropion Stereoselective Disposition and CYP2D6-mediated Drug Interactions in Healthy Volunteers

NCT03420469
View directory record Official record
Conditions
Adverse Effect of Drug Therapy Metabolism Medications (Diagnosis)
Interventions
Bupropion
Drug
Lead sponsor
Indiana University
Other
Eligibility
18 Years to 55 Years
Enrollment
28 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2019
U.S. locations
1
States / cities
Indianapolis, Indiana
Source: ClinicalTrials.gov public record
Updated Dec 22, 2019 · Synced Sep 8, 2026, 11:05 PM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Study to Evaluate Effect of Belatacept on Pharmacokinetics of Inje Cocktail in Healthy Volunteers

NCT01766050
View directory record Official record
Conditions
Transplant Rejection
Interventions
Caffeine, Losartan, Omeprazole, Dextromethorphan, Midazolam, Belatacept
Drug · Biological
Lead sponsor
Bristol-Myers Squibb
Industry
Eligibility
18 Years to 45 Years
Enrollment
45 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013
U.S. locations
1
States / cities
San Antonio, Texas
Source: ClinicalTrials.gov public record
Updated Jun 26, 2014 · Synced Sep 8, 2026, 11:05 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers Results available

Study of SHP620 (Maribavir) in Healthy Adults

NCT02775240
View directory record Official record
Conditions
Cytomegalovirus (CMV)
Interventions
Digoxin, Maribavir, Dextromethorphan
Drug
Lead sponsor
Shire
Industry
Eligibility
18 Years to 50 Years
Enrollment
18 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016
U.S. locations
1
States / cities
Miami, Florida
Source: ClinicalTrials.gov public record
Updated Jun 2, 2021 · Synced Sep 8, 2026, 11:05 PM EDT
Completed Phase 3 Interventional Results available

Safety and Efficacy of AVP-923 in PBA Patients With ALS or MS

NCT00573443
View directory record Official record
Conditions
Pseudobulbar Affect (PBA)
Interventions
dextromethorphan hydrobromide 20 mg and quinidine sulfate 10 mg, dextromethorphan hydrobromide 30 mg and quinidine sulfate 10 mg, Placebo
Drug
Lead sponsor
Avanir Pharmaceuticals
Industry
Eligibility
18 Years to 80 Years
Enrollment
326 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2009
U.S. locations
45
States / cities
Phoenix, Arizona • Scottsdale, Arizona • Anaheim, California + 39 more
Source: ClinicalTrials.gov public record
Updated Apr 11, 2017 · Synced Sep 8, 2026, 11:05 PM EDT
Completed Not applicable Interventional

Hepatic Drug Biotransformation in Children With Obstructive Sleep Apnea

NCT00310323
View directory record Official record
Conditions
Sleep Apnea
Interventions
Dextromethorphan, Caffeine
Drug
Lead sponsor
Virginia Commonwealth University
Other
Eligibility
4 Years to 16 Years
Enrollment
69 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2006
U.S. locations
2
States / cities
Louisville, Kentucky • Richmond, Virginia
Source: ClinicalTrials.gov public record
Updated Mar 18, 2009 · Synced Sep 8, 2026, 11:05 PM EDT
Completed Phase 1 Interventional Results available

Study of Cobimetinib in Participants With Solid Tumors

NCT00467779
View directory record Official record
Conditions
Solid Tumor
Interventions
cobimetinib, dextromethorphan, midazolam
Drug
Lead sponsor
Genentech, Inc.
Industry
Eligibility
18 Years and older
Enrollment
119 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2014
U.S. locations
4
States / cities
Los Angeles, California • Stanford, California • Detroit, Michigan + 1 more
Source: ClinicalTrials.gov public record
Updated Aug 25, 2016 · Synced Sep 8, 2026, 11:05 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

A Phase 1 Study To Evaluate The Effect Of Dimebon On The Pharmacokinetics Of Dextromethorphan

NCT00788047
View directory record Official record
Conditions
Huntington Disease, Alzheimer Disease
Interventions
Dextromethorphan, Dimebon + Dextromethorphan
Drug
Lead sponsor
Pfizer
Industry
Eligibility
18 Years to 55 Years
Enrollment
14 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2009
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Mar 8, 2009 · Synced Sep 8, 2026, 11:05 PM EDT
Terminated Phase 1 Interventional Accepts healthy volunteers

A Study to Evaluate the Effect of Ustekinumab on Cytochrome P450 Enzyme Activities Following Induction and Maintenance Dosing in Participants With Active Crohn's Disease or Ulcerative Colitis

NCT03358706
View directory record Official record
Conditions
Crohn Disease, Ulcerative Colitis
Interventions
Ustekinumab IV Infusion, Ustekinumab SC Injection, Midazolam 2 mg, Warfarin 10 mg, Vitamin K 10 mg, Omeprazole 20 mg, Dextromethorphan 30 mg, Caffeine 100 mg
Drug
Lead sponsor
Janssen Research & Development, LLC
Industry
Eligibility
18 Years to 75 Years
Enrollment
28 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2021
U.S. locations
3
States / cities
Cypress, California • Miami Springs, Florida • Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Aug 20, 2025 · Synced Sep 8, 2026, 11:05 PM EDT
Completed Phase 1 Interventional

A Study To Test The Effect Of GW786034 (Pazopanib) On P450 Enzymes

NCT00401583
View directory record Official record
Conditions
Carcinoma, Renal Cell
Interventions
GW786034 (pazopanib), Probe drugs
Drug
Lead sponsor
GlaxoSmithKline
Industry
Eligibility
21 Years and older
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2008
U.S. locations
1
States / cities
Lebanon, New Hampshire
Source: ClinicalTrials.gov public record
Updated Nov 12, 2017 · Synced Sep 8, 2026, 11:05 PM EDT
Completed Phase 4 Interventional Results available

A Clinical Evidence Study Evaluating Quality of Life Parameters Following Treatment With Robitussin

NCT06716645
View directory record Official record
Conditions
Common Cold, Cough
Interventions
Robitussin Maximum Strength Cough and Chest Congestion DM, Robitussin Maximum Strength Nighttime Cough DM
Drug
Lead sponsor
HALEON
Industry
Eligibility
18 Years and older
Enrollment
244 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2025
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Feb 19, 2026 · Synced Sep 8, 2026, 11:05 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Drug Interaction Study With a Potential Alzheimer's Disease Compound

NCT00726726
View directory record Official record
Conditions
Alzheimer Disease
Interventions
Interacting drugs - Cooperstown Cocktail (midazolam, warfarin, (+ vitamin K), caffeine, omeprazole and dextromethorphan), BMS-708163, BMS-708163 + Cooperstown Cocktail
Drug
Lead sponsor
Bristol-Myers Squibb
Industry
Eligibility
18 Years to 45 Years · Male only
Enrollment
22 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008
U.S. locations
1
States / cities
Hamilton, New Jersey
Source: ClinicalTrials.gov public record
Updated Nov 4, 2008 · Synced Sep 8, 2026, 11:05 PM EDT
Completed Phase 2 Interventional Results available

Efficacy, Safety and Tolerability Study of AVP-923 (Dextromethorphan/Quinidine) for Treatment of Symptoms of Agitation in Participants With Alzheimer's Disease

NCT01584440
View directory record Official record
Conditions
Agitation, Alzheimer's Disease
Interventions
AVP-923-20, Placebo, AVP-923-30
Drug
Lead sponsor
Avanir Pharmaceuticals
Industry
Eligibility
50 Years to 90 Years
Enrollment
220 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2014
U.S. locations
44
States / cities
Phoenix, Arizona • Sun City, Arizona • Fresno, California + 36 more
Source: ClinicalTrials.gov public record
Updated Nov 25, 2021 · Synced Sep 8, 2026, 11:05 PM EDT
Completed Phase 1 Interventional

Pharmacokinetic Study to Evaluate the Effect of a Single Dose of Guselkumab (CNTO 1959) on CYP 450 Enzyme Activities After Subcutaneous Administration in Participants With Psoriasis

NCT02397382
View directory record Official record
Conditions
Psoriasis
Interventions
Guselkumab, Midazolam, Warfarin, Omeprazole, Dextromethorphan, Caffeine
Drug
Lead sponsor
Janssen Research & Development, LLC
Industry
Eligibility
18 Years to 65 Years
Enrollment
16 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2016
U.S. locations
8
States / cities
Anniston, Alabama • North Hollywood, California • Orlando, Florida + 5 more
Source: ClinicalTrials.gov public record
Updated Sep 19, 2017 · Synced Sep 8, 2026, 11:05 PM EDT
Withdrawn Phase 4 Interventional Accepts healthy volunteers

Phase 4, Vedolizumab-4002 Post-marketing, Disease-Drug-Drug Interaction Study

NCT02760615
View directory record Official record
Conditions
Colitis, Ulcerative, Crohn Disease
Interventions
Caffeine, Losartan, Omeprazole, Dextromethorphan, Midazolam, Vedolizumab
Drug
Lead sponsor
Takeda
Industry
Eligibility
18 Years to 55 Years
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2020
U.S. locations
2
States / cities
Cypress, California • Miami, Florida
Source: ClinicalTrials.gov public record
Updated Oct 26, 2020 · Synced Sep 8, 2026, 11:05 PM EDT
Recruiting Early Phase 1 Interventional Accepts healthy volunteers

Evaluating the Pharmacokinetics of Oregano and Potential Oregano-drug Interactions Using a Drug Cocktail Approach

NCT06693960
View directory record Official record
Conditions
Interaction
Interventions
Oregano, Drug cocktail
Dietary Supplement · Drug
Lead sponsor
Washington State University
Other
Eligibility
18 Years to 64 Years
Enrollment
16 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2027
U.S. locations
1
States / cities
Spokane, Washington
Source: ClinicalTrials.gov public record
Updated Jun 3, 2026 · Synced Sep 8, 2026, 11:05 PM EDT
Recruiting Phase 1 Interventional Accepts healthy volunteers

A Study of Psychedelics in Healthy Older Adults With Low Well-being

NCT07386730
View directory record Official record
Conditions
Anhedonia in Healthy Volunteers, Older Adults (50-90 Years)
Interventions
Psilocybin (drug), Dextromethorphan (DXM)
Drug
Lead sponsor
Jennifer Mitchell
Other
Eligibility
50 Years to 85 Years
Enrollment
80 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2030
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Jun 7, 2026 · Synced Sep 8, 2026, 11:05 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers Results available

Open-Label, Multiple-Dose, Non-Randomized Study to Assess Drug-Drug Interactions of Proellex® in Female Subjects

NCT00741468
View directory record Official record
Conditions
Drug Interactions
Interventions
Proellex, CYP1A2 probe, CYP2C9 probe, CYP2C19 probe, CYP2D6 probe, CYP3A4 probe
Drug
Lead sponsor
Repros Therapeutics Inc.
Industry
Eligibility
18 Years to 48 Years · Female only
Enrollment
18 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008
U.S. locations
1
States / cities
Hackensack, New Jersey
Source: ClinicalTrials.gov public record
Updated Aug 21, 2014 · Synced Sep 8, 2026, 11:05 PM EDT
Completed Phase 1 Interventional Results available

A Study of Mirikizumab in Participants With Plaque Psoriasis

NCT03718884
View directory record Official record
Conditions
Psoriasis
Interventions
Drug Cocktail, Mirikizumab
Drug
Lead sponsor
Eli Lilly and Company
Industry
Eligibility
18 Years and older
Enrollment
29 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2019
U.S. locations
3
States / cities
Anaheim, California • DeLand, Florida • High Point, North Carolina
Source: ClinicalTrials.gov public record
Updated Jan 28, 2024 · Synced Sep 8, 2026, 11:05 PM EDT
Completed Phase 1 Interventional Results available

A Study To Test The Impact Of PF- 00299804 On How The Body Handles Dextromethorphan In Cancer Patients

NCT00728468
View directory record Official record
Conditions
Advanced Malignant Solid Tumors
Interventions
PF-00299804
Drug
Lead sponsor
Pfizer
Industry
Eligibility
18 Years and older
Enrollment
16 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2014
U.S. locations
2
States / cities
Buffalo, New York • San Antonio, Texas
Source: ClinicalTrials.gov public record
Updated Aug 1, 2017 · Synced Sep 8, 2026, 11:05 PM EDT
Terminated Phase 1Phase 2 Interventional

TUSC2-nanoparticles and Erlotinib in Stage IV Lung Cancer

NCT01455389
View directory record Official record
Conditions
Lung Cancer
Interventions
DOTAP:Chol-TUSC2, Erlotinib, Dexamethasone, Diphenhydramine
Drug
Lead sponsor
Genprex, Inc.
Industry
Eligibility
18 Years and older
Enrollment
25 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2020
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Mar 1, 2022 · Synced Sep 8, 2026, 11:05 PM EDT