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

Efficacy and Safety of GWP42003-P Oral Solution in Children With Epilepsy With Myoclonic-atonic Seizures

NCT05288283
View directory record Official record
Conditions
Seizures Associated With EMAS
Interventions
GWP42003-P, Placebo
Drug
Lead sponsor
Jazz Pharmaceuticals
Industry
Eligibility
1 Year to 18 Years
Enrollment
3 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2023
U.S. locations
10
States / cities
Birmingham, Alabama • Sacramento, California • Atlanta, Georgia + 7 more
Source: ClinicalTrials.gov public record
Updated Feb 2, 2025 · Synced Sep 24, 2026, 5:46 PM EDT
Completed Phase 1 Interventional Results available

University of Alabama at Birmingham (UAB) Adult CBD Program

NCT02700412
View directory record Official record
Conditions
Epilepsy, Seizures
Interventions
Epidiolex
Drug
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
18 Years to 99 Years
Enrollment
80 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2019
U.S. locations
1
States / cities
Birmingham, Alabama
Source: ClinicalTrials.gov public record
Updated May 7, 2020 · Synced Sep 24, 2026, 5:46 PM EDT
Completed Phase 1Phase 2 Interventional Accepts healthy volunteers Results available

Oral Cannabidiol for Opioid Withdrawal

NCT04238754
View directory record Official record
Conditions
Opioid Withdrawal, Opioid Craving, Opioid Use Disorder
Interventions
Epidiolex, Placebo
Drug
Lead sponsor
Johns Hopkins University
Other
Eligibility
18 Years to 75 Years
Enrollment
3 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2022
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Aug 28, 2023 · Synced Sep 24, 2026, 5:46 PM EDT
Completed Phase 3 Interventional Results available

Study of Efficacy, Safety and Tolerability of Levodopa-Carbidopa Intestinal Gel in Levodopa-Responsive Parkinson's Subjects

NCT00357994
View directory record Official record
Conditions
Advanced Parkinson's Disease
Interventions
Levodopa carbidopa intestinal gel (LCIG), Placebo gel, Levodopa carbidopa (LC) oral encapsulated immediate release (IR) tablets, Placebo (PBO) oral capsules, CADD-Legacy® 1400 ambulatory infusion pump, PEG tube, J-tube
Drug · Device
Lead sponsor
AbbVie (prior sponsor, Abbott)
Industry
Eligibility
30 Years and older
Enrollment
36 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2011
U.S. locations
8
States / cities
Los Angeles, California • Englewood, Colorado • Washington D.C., District of Columbia + 5 more
Source: ClinicalTrials.gov public record
Updated Jan 15, 2015 · Synced Sep 24, 2026, 5:46 PM EDT
Recruiting Phase 1 Interventional Accepts healthy volunteers

Evaluation of Oral THC and CBD in Men and Women

NCT05067387
View directory record Official record
Conditions
Drug Abuse, Intoxication by Drug, Impairment
Interventions
Placebo, THC, CBD, THC + CBD
Drug
Lead sponsor
University of California, Los Angeles
Other
Eligibility
21 Years to 55 Years
Enrollment
22 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2028
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Sep 7, 2026 · Synced Sep 24, 2026, 5:46 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

The Pharmacokinetics and Pharmacodynamics of a Single Acute Dose of a Hemp-derived Oral Product With a 1:1 Ratio of CBD:CBD-A

NCT05049733
View directory record Official record
Conditions
Cannabis
Interventions
CBD 1mg/Kg, CBD 2mg/Kg, CBD 4mg/Kg, Placebo CBD
Drug
Lead sponsor
Johns Hopkins University
Other
Eligibility
18 Years to 55 Years
Enrollment
21 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2023
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Jun 6, 2023 · Synced Sep 24, 2026, 5:46 PM EDT
Terminated Phase 4 Interventional Results available

Investigation of Cannabidiol for Reduction of NeuroInflammation in Chronic Back Pain

NCT03891264
View directory record Official record
Conditions
Back Pain, Low
Interventions
Cannabidiol
Drug
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
18 Years to 75 Years
Enrollment
7 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2020
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated May 3, 2022 · Synced Sep 24, 2026, 5:46 PM EDT
Completed Phase 2 Interventional Results available

A Study of Tolerability and Efficacy of Cannabidiol on Motor Symptoms in Parkinson's Disease

NCT03582137
View directory record Official record
Conditions
Parkinson Disease
Interventions
Cannabidiol, Placebo
Drug · Other
Lead sponsor
University of Colorado, Denver
Other
Eligibility
40 Years to 85 Years
Enrollment
74 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2022
U.S. locations
1
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated Jul 22, 2024 · Synced Sep 24, 2026, 5:46 PM EDT
Completed Phase 3 Interventional Results available

Carbidopa-Levodopa (CD-LD) ER Alone or in Combination With CD-LD IR to IPX066 Followed by IPX066 Extension Safety Study

NCT01411137
View directory record Official record
Conditions
Parkinson's Disease
Interventions
IPX066
Drug
Lead sponsor
Impax Laboratories, LLC
Industry
Eligibility
30 Years and older
Enrollment
43 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2013
U.S. locations
8
States / cities
Birmingham, Alabama • La Jolla, California • Sunnyvale, California + 5 more
Source: ClinicalTrials.gov public record
Updated Nov 6, 2019 · Synced Sep 24, 2026, 5:46 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers

Levodopa for Diabetic Retinopathy

NCT07444892
View directory record Official record
Conditions
Diabetic Retinopathy
Interventions
Levodopa, Placebo
Drug
Lead sponsor
Emory University
Other
Eligibility
18 Years and older
Enrollment
230 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2025
U.S. locations
1
States / cities
Decatur, Georgia
Source: ClinicalTrials.gov public record
Updated Mar 2, 2026 · Synced Sep 24, 2026, 5:46 PM EDT
Completed Early Phase 1 Interventional

Mechanisms of CBD for Chronic Pain

NCT04044729
View directory record Official record
Conditions
Chronic Pain
Interventions
Cannabidiol, Placebo
Drug
Lead sponsor
University of Utah
Other
Eligibility
18 Years to 50 Years
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2024
U.S. locations
1
States / cities
Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated Apr 12, 2025 · Synced Sep 24, 2026, 5:46 PM EDT
Completed Phase 2 Interventional Results available

Cannabidiol (CBD) for Treatment of Aromatase Inhibitor-Associated Arthralgias

NCT04754399
View directory record Official record
Conditions
Arthralgia, Breast Cancer
Interventions
Cannabidiol (CBD)
Drug
Lead sponsor
University of Michigan Rogel Cancer Center
Other
Eligibility
18 Years and older · Female only
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2023
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated May 8, 2025 · Synced Sep 24, 2026, 5:46 PM EDT
Active, not recruiting Phase 4 Interventional

Assessment of Potential for Chronic Liver Injury in Participants Treated With Epidiolex (Cannabidiol) Oral Solution

NCT05044819
View directory record Official record
Conditions
Lennox Gastaut Syndrome, Dravet Syndrome, Tuberous Sclerosis Complex
Interventions
Cannabidiol
Drug
Lead sponsor
Jazz Pharmaceuticals
Industry
Eligibility
1 Year and older
Enrollment
154 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2028
U.S. locations
26
States / cities
Little Rock, Arkansas • Downey, California • Long Beach, California + 22 more
Source: ClinicalTrials.gov public record
Updated Aug 25, 2026 · Synced Sep 24, 2026, 5:46 PM EDT
Not listed Phase 1Phase 2 Interventional

Impact of CBD-Rich Oil on Aversive Memory Reconsolidation

NCT04726475
View directory record Official record
Conditions
Anxiety and Fear
Interventions
Interoceptive Aversive Memory Reactivation, Cannabidiol (CBD)-Rich Broad Spectrum Hemp Extract Oil, Placebo Oil
Behavioral · Dietary Supplement
Lead sponsor
University of Texas at Austin
Other
Eligibility
18 Years to 65 Years
Enrollment
96 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2024
U.S. locations
1
States / cities
Austin, Texas
Source: ClinicalTrials.gov public record
Updated Jan 18, 2022 · Synced Sep 24, 2026, 5:46 PM EDT
Completed Early Phase 1 Interventional Accepts healthy volunteers

Sustained Release Oral Formulation for Treatment of Parkinson's Disease

NCT05471609
View directory record Official record
Conditions
Healthy Volunteers
Interventions
levodopa/carbidopa oral formulation A, levodopa/carbidopa oral formulation B
Drug
Lead sponsor
University of Minnesota
Other
Eligibility
18 Years to 65 Years
Enrollment
6 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated Jun 24, 2026 · Synced Sep 24, 2026, 5:46 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

The Pharmacokinetic and Pharmacodynamic Effects of Oral Cannabidiol (CBD) Under Acute and Chronic Exposure Conditions

NCT04283019
View directory record Official record
Conditions
Cannabis, Drug Effects
Interventions
CBD, THC
Drug
Lead sponsor
Johns Hopkins University
Other
Eligibility
18 Years to 55 Years
Enrollment
75 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2024
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Aug 6, 2024 · Synced Sep 24, 2026, 5:46 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

CBD, Immune Function, and Neural Health

NCT04881539
View directory record Official record
Conditions
Healthy
Interventions
Cannabidiol (CBD)
Dietary Supplement
Lead sponsor
University of Northern Colorado
Other
Eligibility
18 Years to 50 Years
Enrollment
50 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
1
States / cities
Greeley, Colorado
Source: ClinicalTrials.gov public record
Updated Mar 30, 2022 · Synced Sep 24, 2026, 5:46 PM EDT
Completed Phase 2Phase 3 Interventional Results available

Augmenting Language Therapy for Aphasia: Levodopa

NCT01429077
View directory record Official record
Conditions
Nonfluent Aphasia, Stroke
Interventions
levodopa/carbidopa, Placebo comparator
Drug
Lead sponsor
Shirley Ryan AbilityLab
Other
Eligibility
21 Years and older
Enrollment
36 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2012
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Dec 24, 2013 · Synced Sep 24, 2026, 5:46 PM EDT
Not listed Phase 3 Interventional

A Study to Assess the Safety and Efficacy of the of the Gastric-retentive AP-CD/LD in Advanced Parkinson's Patients

NCT02605434
View directory record Official record
Conditions
Parkinson's Disease
Interventions
Accordion Pill™ Carbidopa/Levodopa, Sinemet®, Placebo -AP-CD/LD, Placebo- Sinemet
Drug
Lead sponsor
Intec Pharma Ltd.
Industry
Eligibility
30 Years and older
Enrollment
420 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2019
U.S. locations
36
States / cities
Birmingham, Alabama • Phoenix, Arizona • Fountain Valley, California + 32 more
Source: ClinicalTrials.gov public record
Updated Aug 7, 2019 · Synced Sep 24, 2026, 5:46 PM EDT
Terminated Phase 2 Interventional Results available

Cannabidiol Oral Solution for the Treatment of Patients With Prader-Willi Syndrome

NCT02844933
View directory record Official record
Conditions
Prader-Willi Syndrome
Interventions
Cannabidiol, Placebo
Drug
Lead sponsor
Radius Pharmaceuticals, Inc.
Industry
Eligibility
8 Years to 17 Years
Enrollment
7 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2019
U.S. locations
7
States / cities
Tucson, Arizona • San Diego, California • Iowa City, Iowa + 4 more
Source: ClinicalTrials.gov public record
Updated Jul 31, 2023 · Synced Sep 24, 2026, 5:46 PM EDT
Completed Phase 3 Interventional Results available

Study of Efficacy, Safety and Tolerability of Levodopa-Carbidopa Intestinal Gel in Levodopa-Responsive Parkinson's Subjects

NCT00660387
View directory record Official record
Conditions
Advanced Parkinson's Disease
Interventions
Levodopa carbidopa intestinal gel (LCIG), Placebo Gel, Levodopa-carbidopa (LC) oral encapsulated immediate release (IR) tablets, Placebo (PBO) oral capsules, CADD-Legacy® 1400 ambulatory infusion pump, PEG tube, J-tube
Drug · Device
Lead sponsor
AbbVie (prior sponsor, Abbott)
Industry
Eligibility
30 Years and older
Enrollment
35 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2011
U.S. locations
11
States / cities
Birmingham, Alabama • Fountain Valley, California • Oceanside, California + 8 more
Source: ClinicalTrials.gov public record
Updated Jan 15, 2015 · Synced Sep 24, 2026, 5:46 PM EDT
Recruiting Phase 2 Interventional

The Role of Brain Dopamine in Chronic Pain

NCT05285683
View directory record Official record
Conditions
Chronic Pain
Interventions
Methylphenidate, carbidopa-levodopa, Placebo
Drug
Lead sponsor
University of Rochester
Other
Eligibility
18 Years and older
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2027
U.S. locations
1
States / cities
Rochester, New York
Source: ClinicalTrials.gov public record
Updated May 14, 2026 · Synced Sep 24, 2026, 5:46 PM EDT
Terminated Phase 2Phase 3 Interventional Results available

A Study to Assess RAD011 (Cannabidiol Oral Solution) for the Treatment of Participants With Prader-Willi Syndrome

NCT05098509
View directory record Official record
Conditions
Prader-Willi Syndrome
Interventions
RAD011, Placebo
Drug
Lead sponsor
Radius Pharmaceuticals, Inc.
Industry
Eligibility
8 Years to 65 Years
Enrollment
4 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022
U.S. locations
8
States / cities
Los Angeles, California • San Diego, California • Iowa City, Iowa + 5 more
Source: ClinicalTrials.gov public record
Updated Oct 18, 2023 · Synced Sep 24, 2026, 5:46 PM EDT
Recruiting Phase 2 Interventional

A Study of Cannabidiol in Young Adult Cannabis Users

NCT06569394
View directory record Official record
Conditions
Cannabis Use Disorder
Interventions
Broad Spectrum Cannabidiol (bsCBD) 400 mg, Placebo
Drug
Lead sponsor
University of Colorado, Denver
Other
Eligibility
18 Years to 25 Years
Enrollment
200 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2028
U.S. locations
1
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated Apr 30, 2026 · Synced Sep 24, 2026, 5:46 PM EDT