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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Cytochrome P450 Interaction Clear all
Completed Phase 1 Interventional Accepts healthy volunteers Results available

A Study to Test the Effects of Itraconazole and Carbamazepine on OPC-167832 in Healthy Men and Women

NCT07542847
View directory record Official record
Conditions
Healthy Volunteers
Interventions
OPC-167832, Itraconazole, Carbamazepine
Drug
Lead sponsor
Otsuka Pharmaceutical Development & Commercialization, Inc.
Industry
Eligibility
18 Years to 55 Years
Enrollment
24 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022
U.S. locations
1
States / cities
Lenexa, Kansas
Source: ClinicalTrials.gov public record
Updated Jun 4, 2026 · Synced Jun 26, 2026, 7:20 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Effect of PBI-4050 on the Pharmacokinetics of Midazolam in Heathy Adult Subjects

NCT03637049
View directory record Official record
Conditions
Healthy
Interventions
PBI-4050 and midazolam
Drug
Lead sponsor
Liminal BioSciences Ltd.
Industry
Eligibility
18 Years to 65 Years
Enrollment
22 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018
U.S. locations
1
States / cities
Tempe, Arizona
Source: ClinicalTrials.gov public record
Updated Dec 7, 2020 · Synced Jun 26, 2026, 7:20 AM EDT
Terminated Phase 1 Interventional Results available

Drug-Drug Interaction Study of Vesatolimod in Adults With HIV-1 Who Have Very Low or Undetectable Virus Levels

NCT05458102
View directory record Official record
Conditions
Human Immunodeficiency Virus Type 1 (HIV-1) Infection
Interventions
Vesatolimod, Cobicistat, Voriconazole, Rifabutin
Drug
Lead sponsor
Gilead Sciences
Industry
Eligibility
18 Years and older
Enrollment
18 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2023
U.S. locations
5
States / cities
Long Beach, California • Miami, Florida • West Palm Beach, Florida + 1 more
Source: ClinicalTrials.gov public record
Updated Dec 2, 2024 · Synced Jun 26, 2026, 7:20 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Mifepristone Drug-Drug Interaction Study With CYP3A Inhibitor

NCT03259542
View directory record Official record
Conditions
Drug Interaction Potentiation, Healthy
Interventions
Mifepristone 300 MG, Itraconazole 100 MG
Drug
Lead sponsor
Corcept Therapeutics
Industry
Eligibility
18 Years to 65 Years · Male only
Enrollment
33 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017
U.S. locations
1
States / cities
Miami, Florida
Source: ClinicalTrials.gov public record
Updated Feb 21, 2018 · Synced Jun 26, 2026, 7:20 AM EDT
Completed Not applicable Interventional Results available

Pharmacogenetic Testing Among Home Health Patients

NCT02378220
View directory record Official record
Conditions
Adverse Drug Events, Adverse Drug Reactions, Drug Interaction Potentiation, Drug Metabolism, Poor, CYP2D6-RELATED, Drug Metabolism, Poor, CYP2C19-RELATED, Cytochrome P450 Enzyme Deficiency, Cytochrome P450 CYP2D6 Enzyme Deficiency, Cytochrome P450 CYP2C9 Enzyme Deficiency, Cytochrome P450 CYP2C19 Enzyme Deficiency, Cytochrome P450 CYP3A Enzyme Deficiency, Poor Metabolizer Due to Cytochrome P450 CYP2C9 Variant, Poor Metabolizer Due to Cytochrome p450 CYP2C19 Variant, Poor Metabolizer Due to Cytochrome P450 CYP2D6 Variant
Interventions
Pharmacogenetic testing
Genetic
Lead sponsor
Genelex Corporation
Industry
Eligibility
50 Years and older
Enrollment
110 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2016
U.S. locations
1
States / cities
Searcy, Arkansas
Source: ClinicalTrials.gov public record
Updated Sep 19, 2019 · Synced Jun 26, 2026, 7:20 AM EDT
Withdrawn Not applicable Interventional Accepts healthy volunteers

Effect of Ethanol and Genetic Polymorphisms on Bupropion Metabolism

NCT00330434
View directory record Official record
Conditions
Alcohol Drinking, Depression, Smoking Cessation, Attention Deficit Disorder
Interventions
Trial Withdrawn 1, Trial Withdrawn 2
Other
Lead sponsor
Tufts University
Other
Eligibility
21 Years to 55 Years
Healthy volunteers
Accepts healthy volunteers
Timeline
2005 – 2008
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Nov 9, 2020 · Synced Jun 26, 2026, 7:20 AM EDT
Completed Phase 4 Interventional Results available

Pharmacokinetics of Sublingual Versus Oral Tacrolimus in Patients Awaiting Kidney Transplantation

NCT00629122
View directory record Official record
Conditions
Kidney Failure, Chronic
Interventions
Tacrolimus (Arm B), Clotrimazole Troche, Tacrolimus (Arm A), Nystatin Suspension
Drug
Lead sponsor
Weill Medical College of Cornell University
Other
Eligibility
18 Years and older
Enrollment
5 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2009
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jun 11, 2019 · Synced Jun 26, 2026, 7:20 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers

Effects of Kava on the Body's Elimination of Caffeine and Dextromethorphan

NCT00009542
View directory record Official record
Conditions
Healthy
Interventions
kava (Piper methysticum)
Drug
Lead sponsor
National Institutes of Health Clinical Center (CC)
NIH
Eligibility
Not listed
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2001
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Mar 3, 2008 · Synced Jun 26, 2026, 7:20 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers Results available

Drug - Drug Interaction Study Between Quinine Sulfate and Theophylline

NCT00779259
View directory record Official record
Conditions
Pharmacokinetics
Interventions
Theophylline 300mg, Quinine 648 mg, Theophylline 300 mg
Drug
Lead sponsor
Mutual Pharmaceutical Company, Inc.
Industry
Eligibility
18 Years to 45 Years · Male only
Enrollment
24 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007
U.S. locations
1
States / cities
Fargo, North Dakota
Source: ClinicalTrials.gov public record
Updated Oct 27, 2009 · Synced Jun 26, 2026, 7:20 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

The Effect of Milk Thistle on the Pharmacokinetics of Indinavir

NCT00011635
View directory record Official record
Conditions
HIV Infection, Healthy
Interventions
Silymarin (milk thistle)
Drug
Lead sponsor
National Institutes of Health Clinical Center (CC)
NIH
Eligibility
Not listed
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2001
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Mar 3, 2008 · Synced Jun 26, 2026, 7:20 AM EDT
Completed Phase 2 Interventional Results available

A Study to Assess the Effects of Nemolizumab on Cytochrome P450 Substrates in Participants With Moderate-to-Severe Atopic Dermatitis

NCT04562116
View directory record Official record
Conditions
Atopic Dermatitis
Interventions
Nemolizumab, CYP 450 Substrates
Drug
Lead sponsor
Galderma R&D
Industry
Eligibility
18 Years and older
Enrollment
17 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2023
U.S. locations
5
States / cities
North Hollywood, California • Hallandale, Florida • Miami, Florida + 2 more
Source: ClinicalTrials.gov public record
Updated Dec 4, 2024 · Synced Jun 26, 2026, 7:20 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers Results available

Drug-Drug Interaction Study Between Colchicine and Ketoconazole

NCT00983216
View directory record Official record
Conditions
Pharmacokinetics
Interventions
Colchicine, Ketoconazole
Drug
Lead sponsor
Mutual Pharmaceutical Company, Inc.
Industry
Eligibility
18 Years to 45 Years
Enrollment
24 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008
U.S. locations
1
States / cities
Fargo, North Dakota
Source: ClinicalTrials.gov public record
Updated Oct 14, 2009 · Synced Jun 26, 2026, 7:20 AM EDT
Completed No phase listed Observational

YouScript IMPACT Registry

NCT02191358
View directory record Official record
Conditions
Adverse Drug Events, Adverse Drug Reactions, Drug Interaction Potentiation, Drug Metabolism, Poor, CYP2D6-RELATED, Drug Metabolism, Poor, CYP2C19-RELATED, Cytochrome P450 Enzyme Deficiency, Cytochrome P450 CYP2D6 Enzyme Deficiency, Cytochrome P450 CYP2C9 Enzyme Deficiency, Cytochrome P450 CYP2C19 Enzyme Deficiency, Cytochrome P450 CYP3A Enzyme Deficiency, Poor Metabolizer Due to Cytochrome P450 CYP2C9 Variant, Poor Metabolizer Due to Cytochrome P450 CYP2C19 Variant, Poor Metabolizer Due to Cytochrome P450 CYP2D6 Variant
Interventions
Not listed
Lead sponsor
Genelex Corporation
Industry
Eligibility
65 Years and older
Enrollment
800 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2015
U.S. locations
7
States / cities
Garden Grove, California • Denver, Colorado • Lexington, Kentucky + 3 more
Source: ClinicalTrials.gov public record
Updated Feb 28, 2017 · Synced Jun 26, 2026, 7:20 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

A Study to Assess the Effect Tasimelteon on the Cytochrome P450 3A4 and 2C8 Enzymes in Healthy Subjects

NCT01402076
View directory record Official record
Conditions
Healthy Volunteers
Interventions
Tasimelteon, Rosiglitazone, Midazolam
Drug
Lead sponsor
Vanda Pharmaceuticals
Industry
Eligibility
18 Years to 55 Years
Enrollment
24 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011
U.S. locations
1
States / cities
Springfield, Missouri
Source: ClinicalTrials.gov public record
Updated Feb 16, 2014 · Synced Jun 26, 2026, 7:20 AM 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 Jun 26, 2026, 7:20 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Open Label Drug Interaction Study Evaluating Desvenlafaxine Succinate Sustained Release (DVS SR) 100mg On The Pharmacokinetics Of Aripiprazole When Coadministered To Healthy Subjects

NCT01188668
View directory record Official record
Conditions
Pharmacokinetics, Cytochrome P-450 CYP2D6, CYP3A4 Protein, Human
Interventions
Aripiprazole, Aripiprazole + desvenlafaxine succinate sustained release
Drug
Lead sponsor
Pfizer
Industry
Eligibility
18 Years to 55 Years
Enrollment
38 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010
U.S. locations
2
States / cities
Miami, Florida
Source: ClinicalTrials.gov public record
Updated Nov 6, 2011 · Synced Jun 26, 2026, 7:20 AM 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 Jun 26, 2026, 7:20 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers Results available

Drug-Drug Interaction Study of Qualaquin and Midazolam

NCT00785486
View directory record Official record
Conditions
Healthy
Interventions
Midazolam Alone, Qualaquin (quinine) alone steady state, Midazolam and Qualaquin at steady state
Drug
Lead sponsor
Mutual Pharmaceutical Company, Inc.
Industry
Eligibility
18 Years to 45 Years
Enrollment
24 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007
U.S. locations
1
States / cities
Phoenix, Arizona
Source: ClinicalTrials.gov public record
Updated Aug 30, 2012 · Synced Jun 26, 2026, 7:20 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Assessment of Drug-Drug Interactions of Androxal With Cytochrome P450 Isoenyzmes in Healthy Males

NCT01991327
View directory record Official record
Conditions
Drug-drug Interaction
Interventions
Androxal, Placebo
Drug
Lead sponsor
Repros Therapeutics Inc.
Industry
Eligibility
18 Years to 60 Years · Male only
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014
U.S. locations
1
States / cities
Miami, Florida
Source: ClinicalTrials.gov public record
Updated Aug 10, 2014 · Synced Jun 26, 2026, 7:20 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Determine the Effects of Gene Differences and Voriconazole on Enzyme CYP2B6 Activity in the Liver in Healthy Volunteers

NCT01104376
View directory record Official record
Conditions
Efavirenz, Metabolism and Pharmacokinetics Changes
Interventions
Efavirenz, voriconazole
Drug
Lead sponsor
Indiana University
Other
Eligibility
18 Years to 55 Years
Enrollment
61 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2013
U.S. locations
1
States / cities
Indianapolis, Indiana
Source: ClinicalTrials.gov public record
Updated Dec 16, 2014 · Synced Jun 26, 2026, 7:20 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Human Cytochrome P450 4F Enzymes and Drug Interactions

NCT01250535
View directory record Official record
Conditions
Healthy Volunteers, Drug Drug Interactions
Interventions
Warfarin, Placebo, Lovastatin
Drug
Lead sponsor
University of North Carolina, Chapel Hill
Other
Eligibility
18 Years to 60 Years
Enrollment
19 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2011
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Jan 20, 2013 · Synced Jun 26, 2026, 7:20 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Assess the Influence of Cenobamate on the PK of Cytochrome P450 (CYP) Probe Drugs As a Means of Predicting Drug-drug Interactions

NCT03234699
View directory record Official record
Conditions
Healthy
Interventions
Cenobamate, midazolam, Warfarin Pill, Omeprazole Pill, Bupropion Pill
Drug
Lead sponsor
SK Life Science, Inc.
Industry
Eligibility
18 Years to 50 Years
Enrollment
24 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017
U.S. locations
1
States / cities
Overland Park, Kansas
Source: ClinicalTrials.gov public record
Updated Sep 18, 2024 · Synced Jun 26, 2026, 7:20 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

A Study to Assess the Drug Interaction Between MYK-224 and Itraconazole and Verapamil in Healthy Participants

NCT05304533
View directory record Official record
Conditions
Healthy Participants
Interventions
MYK-224, Itraconazole, Verapamil
Drug
Lead sponsor
Bristol-Myers Squibb
Industry
Eligibility
18 Years to 55 Years
Enrollment
45 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022
U.S. locations
1
States / cities
Dallas, Texas
Source: ClinicalTrials.gov public record
Updated Jan 12, 2023 · Synced Jun 26, 2026, 7:20 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers

Effect of Genetics on Metabolism of Efavirenz

NCT00245986
View directory record Official record
Conditions
Metabolism
Interventions
Blood draw
Procedure
Lead sponsor
National Institutes of Health Clinical Center (CC)
NIH
Eligibility
18 Years to 55 Years
Enrollment
350 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2005 – 2008
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Jul 1, 2017 · Synced Jun 26, 2026, 7:20 AM EDT