Parkinson's Disease (PD)Phase 2COOPERATENCT07651930
Full-Spectrum Cannabidiol Oil for Anxiety and Depressive Symptoms in Parkinson's Disease
A Phase 2 study testing Full-spectrum Cannabidiol (CBD) oil in people with Parkinson's Disease (PD), run by Medical University of Warsaw at 1 site in Poland.
Trial summary
Parkinson's disease (PD) is a progressive neurodegenerative disorder primarily characterized by motor symptoms such as bradykinesia, rigidity, and tremor. However, non-motor symptoms, particularly anxiety and depression, are also common and substantially affect patients' daily functioning and quality of life. Read more about this study
- Who is it for?
- Ages 40 to 70 years
- Conditions the study is for
- Parkinson's Disease (PD)
- What is being tested?
- Full-spectrum Cannabidiol (CBD) oil
- Type of treatment
- Pill or oral medicine
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 27 participants
- Where
- 1 sitePoland
- Study dates
- 18 Dec 2023to 17 Nov 2024
- Phase
- Phase 2
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 40 to 70 years
- All sexes
- No healthy volunteers
- Adult, Older adult
Who may be able to join
- Diagnosed Parkinson's Disease according to MDS Clinical Diagnostic Criteria (2015).
- Disease duration ≥4 years before study inclusion.
- Age between 40 and 70 years at enrollment.
- Stable oral medication regimen (including Parkinson's disease medications, antidepressants, and anxiolytics) for at least 1 month prior to inclusion and maintained throughout the study (up to 2 months from inclusion).
- Moderate or higher anxiety-depressive symptoms at baseline (BDI ≥11 points, BAI ≥16 points)
Who cannot join
- Dementia or cognitive impairment.
- Advanced Parkinson's therapy (DBS, infusion pumps, ablation) or planned initiation within study duration (2 months).
- No caregiver support.
- Pregnancy, breastfeeding, or lack of contraception in women of childbearing potential.
- Neurological or psychiatric disorders affecting evaluation (vascular CNS damage, previous CNS surgery).
- Musculoskeletal conditions preventing motor assessments.
Show all 10Show fewer
- Active malignancy.
- Cannabinoids use within the last 30 days.
- Use of hepatotoxic drugs or drugs with potential toxic interaction with CBD (e.g., valproic acid, warfarin, haloperidol) within 90 days prior to inclusion.
- Paracetamol intake exceeding 1 g/day during study participation
Trial locations and contacts
1 site in 1 country.
Poland1 site
Department of Neurology, Faculty of Health Sciences, Medical University of Warsaw
Warsaw
About this study
Official title: The Impact of Different Concentrations of Hemp-Derived Cannabidiol (CBD) Full-spectrum Oil Solutions in the Treatment of Depressive and Anxiety Disorders in Parkinson's Disease Patients.
Parkinson's disease (PD) is a progressive neurodegenerative disorder primarily characterized by motor symptoms such as bradykinesia, rigidity, and tremor. However, non-motor symptoms, particularly anxiety and depression, are also common and substantially affect patients' daily functioning and quality of life. Cannabidiol (CBD), a non-intoxicating constituent of Cannabis sativa, has demonstrated anti-inflammatory, antioxidant, and anxiolytic properties and has shown therapeutic potential in several clinical settings.
The aim of this study was to evaluate the efficacy and safety of full-spectrum CBD oil administered at three different doses (30 mg/day, 60 mg/day, and 300 mg/day) as adjunctive therapy for anxiety and depressive symptoms in patients with Parkinson's disease. This randomized, double-blind, dose-ranging clinical trial enrolled 27 participants with Parkinson's disease and moderate anxiety-depressive symptoms. Participants aged 40 to 70 years, diagnosed with Parkinson's disease at least four years before enrollment and presenting with moderate or greater anxiety-depressive symptoms, were randomly assigned in a 1:1:1 ratio to receive full-spectrum CBD oil at doses of 30 mg/day, 60 mg/day, or 300 mg/day for two months.
Read more
Assessments were conducted at baseline, Month 1, Month 2 (end of treatment), and Month 3 (1-month post-treatment follow-up) to evaluate treatment effects and safety after treatment discontinuation. Primary outcomes included changes in anxiety and depression severity measured using the Beck Anxiety Inventory (BAI) and Beck Depression Inventory-I (BDI-I). Secondary and other pre-specified outcomes included assessments of sleep quality, fatigue, cognitive functioning, psychosis symptoms, quality of life, motor and non-motor symptoms of Parkinson's disease, daytime sleepiness, pain, wearable sensor-derived motor assessments, and participant-rated treatment effectiveness.
The CBD oils used in the study were prepared under controlled conditions and tested to verify CBD concentration and the absence of contaminants, including heavy metals and mold contamination.
Participants were monitored throughout the study for adverse events, including somnolence, fatigue, gastrointestinal symptoms, and potential treatment-related safety concerns. The study evaluated the potential role of CBD as an adjunctive treatment for anxiety and depressive symptoms in Parkinson's disease and assessed the safety and tolerability of different CBD dosing regimens.
The duration of participation for each participant was approximately three months, including a two-month treatment period and a one-month follow-up assessment.
- Conditions
- Parkinson's Disease (PD)
- Being tested
- Full-spectrum Cannabidiol (CBD) oil
- Keywords
- Parkinson's Disease, Depression, Anxiety Disorders
- Medical subject headings
- Depression, Anxiety Disorders
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Full-spectrum Cannabidiol (CBD) oilDietary supplement
Also called CBD oil, Cannabidiol oil
Participants will receive full-spectrum cannabidiol (CBD) oil, administered orally as a dietary supplement. CBD oil will be delivered sublingually twice daily during meals. Three dosage groups will be studied: 30 mg/day, 60 mg/day, and 300 mg/day. CBD oil used in the study contains 2000 mg CBD per 30 ml bottle. Each participant will receive blinded bottles labeled with unique identifiers, ensuring double-blind administration. The duration of intervention is 60 days, followed by a one-month follow-up period to assess safety and lasting effects after discontinuation.
| Study group | Role | What they receive |
|---|---|---|
| Arm 1: CBD oil 30 mg/day | Active comparator | Intervention type: Dietary Supplement Product description: Full-spectrum CBD oil (2000 mg CBD/30 ml bottle) Dose: 30 mg CBD/day, divided into two doses (15 mg each) Route of administration: Sublingual, administered orally during meals Frequency: Twice daily Duration: 60 days Receives: Dietary Supplement: Full-spectrum Cannabidiol (CBD) oil |
| Arm 2: CBD oil 60 mg/day | Active comparator | Intervention type: Dietary Supplement Product description: Full-spectrum CBD oil (2000 mg CBD/30 ml bottle) Dose: 60 mg CBD/day, divided into two doses (30 mg each) Route of administration: Sublingual, administered orally during meals Frequency: Twice daily Duration: 60 days Receives: Dietary Supplement: Full-spectrum Cannabidiol (CBD) oil |
| Arm 3: CBD oil 300 mg/day | Active comparator | Intervention type: Dietary Supplement Product description: Full-spectrum CBD oil (2000 mg CBD/30 ml bottle) Dose: 300 mg CBD/day, divided into two doses (150 mg each) Route of administration: Sublingual, administered orally during meals Frequency: Twice daily Duration: 60 days Receives: Dietary Supplement: Full-spectrum Cannabidiol (CBD) oil |
What is being measured
The primary outcome is the main question the study is designed to answer.
Change in anxiety symptom severity measured by the Beck Anxiety Inventory (BAI)
Anxiety symptom severity will be assessed using the Beck Anxiety Inventory (BAI). The outcome measure is the change in total BAI score from baseline to subsequent assessment time points. Higher scores indicate greater anxiety symptom severity.
Measured: Baseline, Month 1, Month 2 (end of treatment), and Month 3 (1-month post-treatment follow-up)
Change in depressive symptom severity measured by the Beck Depression Inventory-I (BDI-I)
Depressive symptom severity will be assessed using the Beck Depression Inventory-I (BDI-I). The outcome measure is the change in total BDI-I score from baseline to subsequent assessment time points. Higher scores indicate greater depressive symptom severity.
Measured: Baseline, Month 1, Month 2 (end of treatment), and Month 3 (1-month post-treatment follow-up)
Secondary outcomes (16)
Change in insomnia severity measured by the Athens Insomnia Scale (AIS)
Insomnia severity will be assessed using the Athens Insomnia Scale (AIS). The outcome measure is the change in total AIS score from baseline to subsequent assessment time points. Higher scores indicate greater insomnia severity.
Measured: Baseline, Month 1, Month 2 (end of treatment), and Month 3 (1-month post-treatment follow-up)
Change in anxiety symptoms measured by the Hospital Anxiety and Depression Scale - Anxiety Subscale (HADS-A)
Anxiety symptoms will be assessed using the Hospital Anxiety and Depression Scale - Anxiety Subscale (HADS-A). The outcome measure is the change in HADS-A score from baseline to subsequent assessment time points. Higher scores indicate greater anxiety symptom severity.
Measured: Baseline, Month 1, Month 2 (end of treatment), and Month 3 (1-month post-treatment follow-up)
Change in depressive symptoms measured by the Hospital Anxiety and Depression Scale - Depression Subscale (HADS-D)
Depressive symptoms will be assessed using the Hospital Anxiety and Depression Scale - Depression Subscale (HADS-D). The outcome measure is the change in HADS-D score from baseline to subsequent assessment time points. Higher scores indicate greater depressive symptom severity.
Measured: Baseline, Month 1, Month 2 (end of treatment), and Month 3 (1-month post-treatment follow-up)
Change in depression symptoms measured by the Depression Anxiety Stress Scales - Depression Subscale (DASS-21 Depression)
Depression symptoms will be assessed using the DASS-21 Depression Subscale. The outcome measure is the change in depression subscale score from baseline to subsequent assessment time points. Higher scores indicate greater depressive symptom severity.
Measured: Baseline, Month 1, Month 2 (end of treatment), and Month 3 (1-month post-treatment follow-up)
Change in anxiety symptoms measured by the Depression Anxiety Stress Scales - Anxiety Subscale (DASS-21 Anxiety)
Anxiety symptoms will be assessed using the DASS-21 Anxiety Subscale. The outcome measure is the change in anxiety subscale score from baseline to subsequent assessment time points. Higher scores indicate greater anxiety symptom severity.
Measured: Baseline, Month 1, Month 2 (end of treatment), and Month 3 (1-month post-treatment follow-up)
Change in stress symptoms measured by the Depression Anxiety Stress Scales - Stress Subscale (DASS-21 Stress)
Stress symptoms will be assessed using the DASS-21 Stress Subscale. The outcome measure is the change in stress subscale score from baseline to subsequent assessment time points. Higher scores indicate greater stress symptom severity.
Measured: Baseline, Month 1, Month 2 (end of treatment), and Month 3 (1-month post-treatment follow-up)
Change in psychosis symptom severity measured by the Parkinson Psychosis Questionnaire (PPQ)
Psychosis symptoms will be assessed using the Parkinson Psychosis Questionnaire (PPQ). The outcome measure is the change in total PPQ score from baseline to subsequent assessment time points. Higher scores indicate greater frequency and severity of psychotic symptoms.
Measured: Baseline, Month 1, Month 2 (end of treatment), and Month 3 (1-month post-treatment follow-up)
Change in life satisfaction measured by the Satisfaction With Life Scale (SWLS)
Life satisfaction will be assessed using the Satisfaction With Life Scale (SWLS). The outcome measure is the change in total SWLS score from baseline to subsequent assessment time points. Higher scores indicate greater life satisfaction.
Measured: Baseline, Month 1, Month 2 (end of treatment), and Month 3 (1-month post-treatment follow-up)
Change in fatigue measured by the Fatigue Assessment Scale (FAS)
Fatigue will be assessed using the Fatigue Assessment Scale (FAS). The outcome measure is the change in total FAS score from baseline to subsequent assessment time points. Higher scores indicate greater fatigue.
Measured: Baseline, Month 1, Month 2 (end of treatment), and Month 3 (1-month post-treatment follow-up)
Change in pain severity measured by the Visual Analogue Scale (VAS)
Pain severity will be assessed using a Visual Analogue Scale (VAS). The outcome measure is the change in pain intensity score from baseline to subsequent assessment time points. Higher scores indicate greater pain severity.
Measured: Baseline, Month 1, Month 2 (end of treatment), and Month 3 (1-month post-treatment follow-up)
Change in health-related quality of life measured by the Parkinson's Disease Questionnaire (PDQ-39)
Health-related quality of life will be assessed using the Parkinson's Disease Questionnaire (PDQ-39). The outcome measure is the change in total PDQ-39 score from baseline to subsequent assessment time points. Higher scores indicate poorer health-related quality of life.
Measured: Baseline, Month 1, Month 2 (end of treatment), and Month 3 (1-month post-treatment follow-up)
Change in sleep-related symptoms measured by the Parkinson's Disease Sleep Scale (PDSS-1)
Sleep-related symptoms will be assessed using the Parkinson's Disease Sleep Scale (PDSS-1). The outcome measure is the change in total PDSS-1 score from baseline to subsequent assessment time points. Higher scores indicate better sleep quality and fewer sleep-related symptoms.
Measured: Baseline, Month 1, Month 2 (end of treatment), and Month 3 (1-month post-treatment follow-up)
Change in motor symptom severity measured by the Movement Disorder Society Unified Parkinson's Disease Rating Scale (MDS-UPDRS)
Motor and non-motor symptom severity will be assessed using the MDS-Unified Parkinson's Disease Rating Scale (MDS-UPDRS). The outcome measure is the change in total MDS-UPDRS score from baseline to subsequent assessment time points. Higher scores indicate greater disease severity.
Measured: Baseline, Month 1, Month 2 (end of treatment), and Month 3 (1-month post-treatment follow-up)
Change in non-motor symptom burden measured by the Non-Motor Symptoms Scale (NMSS)
Non-motor symptom burden will be assessed using the Non-Motor Symptoms Scale (NMSS). The outcome measure is the change in total NMSS score from baseline to subsequent assessment time points. Higher scores indicate greater non-motor symptom burden.
Measured: Baseline, Month 1, Month 2 (end of treatment), and Month 3 (1-month post-treatment follow-up)
Change in daytime sleepiness measured by the Epworth Sleepiness Scale (ESS)
Daytime sleepiness will be assessed using the Epworth Sleepiness Scale (ESS). The outcome measure is the change in total ESS score from baseline to subsequent assessment time points. Higher scores indicate greater daytime sleepiness.
Measured: Baseline, Month 1, Month 2 (end of treatment), and Month 3 (1-month post-treatment follow-up)
Change in health-related quality of life measured by the EuroQol-5D (EQ-5D)
Health-related quality of life will be assessed using the EuroQol-5D (EQ-5D). The outcome measure is the change in EQ-5D health status score from baseline to subsequent assessment time points. Higher scores indicate better perceived health status.
Measured: Baseline, Month 1, Month 2 (end of treatment), and Month 3 (1-month post-treatment follow-up)
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted16 Jun 2026
- Study start18 Dec 2023
- Primary completion17 Nov 2024
- Study completion17 Nov 2024
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (2)Papers the sponsor has linked to this study.
- Other trials for Parkinson's Disease (PD)Studies of the same condition, open and under way.
- More trials run by Medical University of WarsawThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase 2
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Double blind
- Who is masked
- Participant, Outcomes assessor
- Enrolment
- 27 participants (actual)
Sponsor and investigators
- Lead sponsor
- Medical University of Warsaw
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, Stanislaw Szlufik, Medical University of Warsaw
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT07651930
- Sponsor's protocol ID
- KB/279/2023
- Acronym
- COOPERATE
- Status last verified
- Jul 2025
- First submitted
- 7 Jul 2025
- Last updated
- 16 Jun 2026
- Results posted
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- No
Publications
Schier AR, Ribeiro NP, Silva AC, Hallak JE, Crippa JA, Nardi AE, Zuardi AW. Cannabidiol, a Cannabis sativa constituent, as an anxiolytic drug. Braz J Psychiatry. 2012 Jun;34 Suppl 1:S104-10. doi: 10.1590/s1516-44462012000500008. English, Portuguese.
PubMed 22729452Nagarkatti P, Pandey R, Rieder SA, Hegde VL, Nagarkatti M. Cannabinoids as novel anti-inflammatory drugs. Future Med Chem. 2009 Oct;1(7):1333-49. doi: 10.4155/fmc.09.93.
PubMed 20191092
Study at a glance
From the registry record, last updated by the sponsor on 16 Jun 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- The Impact of Different Concentrations of Hemp-Derived Cannabidiol (CBD) Full-spectrum Oil Solutions in the Treatment of Depressive and Anxiety Disorders in Parkinson's Disease Patients.
- ClinicalTrials.gov ID
- NCT07651930
- Acronym / sponsor ID
- COOPERATE / KB/279/2023
- Conditions
- Parkinson's Disease (PD)
- Keywords
- Parkinson's Disease, Depression, Anxiety Disorders
- Phase
- Phase 2
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 27 participants (actual)
- Lead sponsor
- Medical University of WarsawUniversity, hospital or other
- Study start
- 18 Dec 2023 (actual)
- Primary completion
- 17 Nov 2024 (actual)
- Study completion
- 17 Nov 2024 (actual)
- First posted
- 16 Jun 2026 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
Parkinson's disease (PD) is a progressive neurodegenerative disorder primarily characterized by motor symptoms such as bradykinesia, rigidity, and tremor. However, non-motor symptoms, particularly anxiety and depression, are also common and substantially affect patients' daily functioning and quality of life. Cannabidiol (CBD), a non-intoxicating constituent of Cannabis sativa, has demonstrated anti-inflammatory, antioxidant, and anxiolytic properties and has shown therapeutic potential in several clinical settings.
The aim of this study was to evaluate the efficacy and safety of full-spectrum CBD oil administered at three different doses (30 mg/day, 60 mg/day, and 300 mg/day) as adjunctive therapy for anxiety and depressive symptoms in patients with Parkinson's disease. This randomized, double-blind, dose-ranging clinical trial enrolled 27 participants with Parkinson's disease and moderate anxiety-depressive symptoms. Participants aged 40 to 70 years, diagnosed with Parkinson's disease at least four years before enrollment and presenting with moderate or greater anxiety-depressive symptoms, were randomly assigned in a 1:1:1 ratio to receive full-spectrum CBD oil at doses of 30 mg/day, 60 mg/day, or 300 mg/day for two months.
Assessments were conducted at baseline, Month 1, Month 2 (end of treatment), and Month 3 (1-month post-treatment follow-up) to evaluate treatment effects and safety after treatment discontinuation. Primary outcomes included changes in anxiety and depression severity measured using the Beck Anxiety Inventory (BAI) and Beck Depression Inventory-I (BDI-I). Secondary and other pre-specified outcomes included assessments of sleep quality, fatigue, cognitive functioning, psychosis symptoms, quality of life, motor and non-motor symptoms of Parkinson's disease, daytime sleepiness, pain, wearable sensor-derived motor assessments, and participant-rated treatment effectiveness.
The CBD oils used in the study were prepared under controlled conditions and tested to verify CBD concentration and the absence of contaminants, including heavy metals and mold contamination.
Participants were monitored throughout the study for adverse events, including somnolence, fatigue, gastrointestinal symptoms, and potential treatment-related safety concerns. The study evaluated the potential role of CBD as an adjunctive treatment for anxiety and depressive symptoms in Parkinson's disease and assessed the safety and tolerability of different CBD dosing regimens.
The duration of participation for each participant was approximately three months, including a two-month treatment period and a one-month follow-up assessment.
Study design
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Double blind (participant, outcomes assessor)
- Number of arms
- 3
| Arm | Type | Receives |
|---|---|---|
| Arm 1: CBD oil 30 mg/day | Active comparator | Dietary Supplement: Full-spectrum Cannabidiol (CBD) oilIntervention type: Dietary Supplement Product description: Full-spectrum CBD oil (2000 mg CBD/30 ml bottle) Dose: 30 mg CBD/day, divided into two doses (15 mg each) Route of administration: Sublingual, administered orally during meals Frequency: Twice daily Duration: 60 days |
| Arm 2: CBD oil 60 mg/day | Active comparator | Dietary Supplement: Full-spectrum Cannabidiol (CBD) oilIntervention type: Dietary Supplement Product description: Full-spectrum CBD oil (2000 mg CBD/30 ml bottle) Dose: 60 mg CBD/day, divided into two doses (30 mg each) Route of administration: Sublingual, administered orally during meals Frequency: Twice daily Duration: 60 days |
| Arm 3: CBD oil 300 mg/day | Active comparator | Dietary Supplement: Full-spectrum Cannabidiol (CBD) oilIntervention type: Dietary Supplement Product description: Full-spectrum CBD oil (2000 mg CBD/30 ml bottle) Dose: 300 mg CBD/day, divided into two doses (150 mg each) Route of administration: Sublingual, administered orally during meals Frequency: Twice daily Duration: 60 days |
Who may qualify
- Ages
- 40 to 70 years
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (5 listed)
- Diagnosed Parkinson's Disease according to MDS Clinical Diagnostic Criteria (2015).
- Disease duration ≥4 years before study inclusion.
- Age between 40 and 70 years at enrollment.
- Stable oral medication regimen (including Parkinson's disease medications, antidepressants, and anxiolytics) for at least 1 month prior to inclusion and maintained throughout the study (up to 2 months from inclusion).
- Moderate or higher anxiety-depressive symptoms at baseline (BDI ≥11 points, BAI ≥16 points)
Key exclusion criteria (10 listed)
- Dementia or cognitive impairment.
- Advanced Parkinson's therapy (DBS, infusion pumps, ablation) or planned initiation within study duration (2 months).
- No caregiver support.
- Pregnancy, breastfeeding, or lack of contraception in women of childbearing potential.
- Neurological or psychiatric disorders affecting evaluation (vascular CNS damage, previous CNS surgery).
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| Full-spectrum Cannabidiol (CBD) oilAlso: CBD oil, Cannabidiol oilParticipants will receive full-spectrum cannabidiol (CBD) oil, administered orally as a dietary supplement. CBD oil will be delivered sublingually twice daily during meals. Three dosage groups will be studied: 30 mg/day, 60 mg/day, and 300 mg/day. CBD oil used in the study contains 2000 mg CBD per 30 ml bottle. Each participant will receive blinded bottles labeled with unique identifiers, ensuring double-blind administration. The duration of intervention is 60 days, followed by a one-month follow-up period to assess safety and lasting effects after discontinuation. | Dietary supplement | Arm 1: CBD oil 30 mg/day, Arm 2: CBD oil 60 mg/day, Arm 3: CBD oil 300 mg/day |
Primary outcome
Change in anxiety symptom severity measured by the Beck Anxiety Inventory (BAI)
Time frame: Baseline, Month 1, Month 2 (end of treatment), and Month 3 (1-month post-treatment follow-up)
Anxiety symptom severity will be assessed using the Beck Anxiety Inventory (BAI). The outcome measure is the change in total BAI score from baseline to subsequent assessment time points. Higher scores indicate greater anxiety symptom severity.
Change in depressive symptom severity measured by the Beck Depression Inventory-I (BDI-I)
Time frame: Baseline, Month 1, Month 2 (end of treatment), and Month 3 (1-month post-treatment follow-up)
Depressive symptom severity will be assessed using the Beck Depression Inventory-I (BDI-I). The outcome measure is the change in total BDI-I score from baseline to subsequent assessment time points. Higher scores indicate greater depressive symptom severity.
16 secondary outcomes
Change in insomnia severity measured by the Athens Insomnia Scale (AIS)
Time frame: Baseline, Month 1, Month 2 (end of treatment), and Month 3 (1-month post-treatment follow-up)
Change in anxiety symptoms measured by the Hospital Anxiety and Depression Scale - Anxiety Subscale (HADS-A)
Time frame: Baseline, Month 1, Month 2 (end of treatment), and Month 3 (1-month post-treatment follow-up)
Change in depressive symptoms measured by the Hospital Anxiety and Depression Scale - Depression Subscale (HADS-D)
Time frame: Baseline, Month 1, Month 2 (end of treatment), and Month 3 (1-month post-treatment follow-up)
Change in depression symptoms measured by the Depression Anxiety Stress Scales - Depression Subscale (DASS-21 Depression)
Time frame: Baseline, Month 1, Month 2 (end of treatment), and Month 3 (1-month post-treatment follow-up)
Change in anxiety symptoms measured by the Depression Anxiety Stress Scales - Anxiety Subscale (DASS-21 Anxiety)
Time frame: Baseline, Month 1, Month 2 (end of treatment), and Month 3 (1-month post-treatment follow-up)
Change in stress symptoms measured by the Depression Anxiety Stress Scales - Stress Subscale (DASS-21 Stress)
Time frame: Baseline, Month 1, Month 2 (end of treatment), and Month 3 (1-month post-treatment follow-up)
Change in psychosis symptom severity measured by the Parkinson Psychosis Questionnaire (PPQ)
Time frame: Baseline, Month 1, Month 2 (end of treatment), and Month 3 (1-month post-treatment follow-up)
Change in life satisfaction measured by the Satisfaction With Life Scale (SWLS)
Time frame: Baseline, Month 1, Month 2 (end of treatment), and Month 3 (1-month post-treatment follow-up)
Change in fatigue measured by the Fatigue Assessment Scale (FAS)
Time frame: Baseline, Month 1, Month 2 (end of treatment), and Month 3 (1-month post-treatment follow-up)
Change in pain severity measured by the Visual Analogue Scale (VAS)
Time frame: Baseline, Month 1, Month 2 (end of treatment), and Month 3 (1-month post-treatment follow-up)
Change in health-related quality of life measured by the Parkinson's Disease Questionnaire (PDQ-39)
Time frame: Baseline, Month 1, Month 2 (end of treatment), and Month 3 (1-month post-treatment follow-up)
Change in sleep-related symptoms measured by the Parkinson's Disease Sleep Scale (PDSS-1)
Time frame: Baseline, Month 1, Month 2 (end of treatment), and Month 3 (1-month post-treatment follow-up)
Change in motor symptom severity measured by the Movement Disorder Society Unified Parkinson's Disease Rating Scale (MDS-UPDRS)
Time frame: Baseline, Month 1, Month 2 (end of treatment), and Month 3 (1-month post-treatment follow-up)
Change in non-motor symptom burden measured by the Non-Motor Symptoms Scale (NMSS)
Time frame: Baseline, Month 1, Month 2 (end of treatment), and Month 3 (1-month post-treatment follow-up)
Change in daytime sleepiness measured by the Epworth Sleepiness Scale (ESS)
Time frame: Baseline, Month 1, Month 2 (end of treatment), and Month 3 (1-month post-treatment follow-up)
Change in health-related quality of life measured by the EuroQol-5D (EQ-5D)
Time frame: Baseline, Month 1, Month 2 (end of treatment), and Month 3 (1-month post-treatment follow-up)
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 16 Jun 2026.
- Background: PubMed 22729452Schier AR, Ribeiro NP, Silva AC, Hallak JE, Crippa JA, Nardi AE, Zuardi AW. Cannabidiol, a Cannabis sativa constituent, as an anxiolytic drug. Braz J Psychiatry. 2012 Jun;34 Suppl 1:S104-10. doi: 10.1590/s1516-44462012000500008. English, Portuguese.
- Background: PubMed 20191092Nagarkatti P, Pandey R, Rieder SA, Hegde VL, Nagarkatti M. Cannabinoids as novel anti-inflammatory drugs. Future Med Chem. 2009 Oct;1(7):1333-49. doi: 10.4155/fmc.09.93.
- Individual participant dataSharing planned: No
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
The record lists no contact. Use the official record to reach the sponsor.
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A Phase 2 study testing Full-spectrum Cannabidiol (CBD) oil in people with Parkinson's Disease (PD), run by Medical University of Warsaw at 1 site in Poland.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 5 inclusion and 10 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 16 Jun 2026. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in Poland. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
What does this phase mean?
Phase 2 studies give the treatment to a larger group to see whether it has the intended effect and to keep checking safety.
Not every study follows the same path, and some studies (observational studies, device studies) have no phase.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Change in anxiety symptom severity measured by the Beck Anxiety Inventory (BAI) (time frame: Baseline, Month 1, Month 2 (end of treatment), and Month 3 (1-month post-treatment follow-up)). The study lists 2 primary outcomes in all. It is what the study was designed to measure, not a finding.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT07651930, which also lists 2 linked publications.
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 16 Jun 2026.