ClinicalTrials.gg
RecruitingNCT06393101Updated Jun 7, 2024

The Effects and Mechanisms of a High CBD Cannabis Extract (BRC-002) for the Treatment of Pain and Health in Complex Regional Pain Syndrome

A Phase 1 interventional study of BRC-002 and BRC-002 Placebo in Complex Regional Pain Syndrome, sponsored by University of California, San Diego. Recruiting at 2 sites in United States. Open to participants aged 21 Years to 75 Years. Per ClinicalTrials.gov, last updated 2024-06-07.

Sponsored by University of California, San Diego · Phase 1, Interventional, and Treatment

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Phase
Phase 1
Study type
Interventional
Enrollment
52
Allocation
Randomized
Ages
21 Years to 75 Years
Sex
All
01

Where this study stands

Counted across the records on this site · 2026-11-13

Among 88 studies in Complex Regional Pain Syndromes with a site in United States — 20 open to participants now, 22 under way, 2 of them phase 3. Complex Regional Pain Syndromes · United States.

Planned enrollment
22nd of 67
52 · median 30
Started
2024
with 2 others
Phase 1
5 of 88
1 open now
Primary completion
2029-06
later than 20 of 21 live
Registered
80th of 88
by date

Among the 88 studies in Complex Regional Pain Syndromes with a site in United States, this one is the 22nd largest by planned enrollment of the 67 interventional ones that give a count, is one of 3 that started in 2024, is one of 5 in phase 1, reaches primary completion later than 20 of the 21 other live ones, and was the 80th registered.

Complex Regional Pain Syndromes

206 studies on the registry are indexed under Complex Regional Pain Syndromes; 55 are open to participants now.

Browse Complex Regional Pain Syndromes studies →

Open to participants now

20 of the 88 studies in Complex Regional Pain Syndromes with a site in United States are open now. Recruiting first, the newest first:

14 more — sign in →

All 20 open studies →

A study can be open while its sites in United States have not opened yet or have stopped. Only those recruiting at a site in United States →

Who these studies take

Of the 39 Complex Regional Pain Syndromes studies recruiting now, 17 (44%) set no upper age limit and 16 (41%) stop at 75 or younger; 3 take children under 18; 5 take healthy volunteers.

This study: 21 Years to 75 Years · all sexes · no healthy volunteers.

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02

Study summary

The aim of this trial is to determine the potential effects and mechanisms of cannabinoid-induced pain relief in complex regional pain syndrome (CRPS). Multiple psychophysical approaches will be conducted in conjunction with psychological and inflammatory marker testing to determine if and how cannabinoids produce stabilized improvement in CRPS-related pain and comorbidities.

The trial consisted of a pre-treatment screening period, six-week treatment period and a two-week follow-up.

Read the detailed description

Complex Regional Pain Syndrome (CRPS) is a debilitating and perplexing chronic pain condition that produces incalculable suffering to millions of individuals worldwide. The enigmatic nature of CRPS has left it difficult to treat. CRPS is characterized by a constellation of pain, sensory, autonomic, and motor symptoms that is difficult to pinpoint the source of injury/inflammation. Although unclear, a common cause of CRPS are radial fractures that demonstrate aberrant processing 4-6 weeks after injury.

The aim of this trial is to determine the potential effects and mechanisms of cannabinoid-induced pain relief in complex regional pain syndrome (CRPS). Multiple psychophysical approaches will be conducted in conjunction with psychological and inflammatory marker testing to determine if and how cannabinoids produce stabilized improvement in CRPS-related pain and comorbidities.

The trial consisted of a pre-treatment screening period, six-week treatment period and a two-week follow-up.

03

Conditions studied

  • Complex Regional Pain Syndrome

Keywords

  • Complex Regional Pain Syndrome
  • CRPS
  • Cannabis
  • Pain
04

Who can participate

Ages eligible
21 Years to 75 Years
Sexes eligible
All
Accepts healthy volunteers
No

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  1. Provision of signed and dated form.
  2. Are between 21-75 years old
  3. Ability to communicate in English
  4. Volunteers with no previous medical history (e.g., cardiac or pulmonary disease)
  5. Are not currently using any type of cannabis, including hemp or CBD
  6. Currently 30 days cannabis free
  7. Participants with ongoing CRPS [Type 1 or Type 2)] for at least 3 months prior to participation (medical record confirmed)
  8. Agrees not to use cannabis, including hemp or CBD, outside of the study during participation in the study
  9. Agrees not to use opioids or barbiturates during participation in the study

Exclusion criteria

Exclusion Criteria:

  1. Fail cannabis screening
  2. Active pulmonary disease
  3. Allergy or past adverse effects or negative past experiences from cannabis
  4. Positive urine drug test for THC, barbiturates, opioids, oxycodone, or methadone prior to study session 1 or session 2
  5. Any significant illness, including cardiovascular disease, diabetes, renal and liver disease
  6. Any current or history of an immunocompromising disease or condition (such as lupus, psoriasis, multiple sclerosis, etc.)
  7. Any current or history of neurologic conditions, including Parkinson disease, dementia, cognitive impairment, history of seizure disorder, and history of traumatic brain injury/head injury
  8. Participant meets criteria for current major psychiatric illness, such as bipolar disorder, major depression, psychosis, substance use disorder, or schizophrenia
  9. Any current or history of suicidal ideation or attempt
  10. Patients with laboratory abnormalities
Terms in these criteria, in plain language(3)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

Informed consent

Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.

You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.

DSM diagnostic criteria

The American Psychiatric Association’s manual of mental health diagnoses. DSM-5 (2013, revised as DSM-5-TR in 2022) replaced DSM-IV, and some studies still name the older edition. “Meets DSM criteria for …” means diagnosed by that edition’s diagnostic criteria, usually by a clinician in an interview.

Clinically significant

Judged by the study doctor to matter for your health or for the study. It is a doctor’s decision, so ask the study team if you are unsure whether something counts.

05

Study design

Phase
Phase 1
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Quadruple (Participant, Care provider, Investigator, Outcomes assessor)
Enrollment
52 participants (estimated)

Study arms

  • Placebo comparator
    Placebo Comparator: 1 Placebo

    Half of the patients will receive PO placebo

    Drug: BRC-002 Placebo

  • Experimental
    Experimental: Active

    Drug: BRC-002 (High Cannabidiol Botanical Extract) 100 mg/mL

    Drug: BRC-002

Interventions

  • BRC-002 is a non-scheduled cannabidiolic (CBD) formulation (\<.3% THC). The cannabinoids in BRC-002 are naturally biosynthesized within the Cannabis sativa L. plant as acidic forms of CBD (cannabidiolic acid; CBDA), THC (tetrahydrocannabinolic acid; THCA) and other minor cannabinoids.

  • DrugBRC-002 Placebo

    Oral solution of mono-, di-, and triglycerides

06

What researchers measure

Primary outcomes

  1. Change in complex regional pain syndrome pain and heat pain measured with VAS

    Change from baseline in pain intensity and unpleasantness ratings using an 11-point Visual Analog Scale in response to heat and ongoing CRPS pain

    Time frame: Day 1 - Day 42

Secondary outcomes

  1. Pain Inventory Measure

    Change from baseline in The Brief Pain Inventory

    Time frame: Day 1 - Day 42

  2. Depression Measure

    Change from baseline in Beck Depression

    Time frame: Day 1 - Day 42

  3. Sleep Measure

    Change from baseline in Pittsburgh Sleep Quality Index

    Time frame: Day 1 - Day 42

  4. Interleukin 6

    Change from baseline in Interleukin 6

    Time frame: Day 1 - Day 42

07

Study locations

2 of 2 sites recruiting
08

References and documents

Individual participant data

Plan to share: No

No publications or documents are linked to this record.

09

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reached

Start is estimated for Jun 2024; primary completion for Jun 2029, 60 months later.

How these figures are worked out, and which studies are left out of them.

Registered
Apr 24, 2024
First posted
May 1, 2024
StartEst.
Jun 1, 2024
Primary completionEst.
Jun 1, 2029
CompletionEst.
Jun 1, 2029
Last update
Jun 7, 2024
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Jun 7, 2024, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT06393101
Responsible party
Fadel Zeidan (Associate Professor, University of California, San Diego) — Principal investigator
First posted
May 1, 2024
Start date
Jun 1, 2024 (estimated)
Primary completion
Jun 1, 2029 (estimated)
Completion
Jun 1, 2029 (estimated)
Last update
Jun 7, 2024

Study contacts

Fadel Zeidan, PhD
Contact
fzeidan@health.ucsd.edu
858-246-8341
Yasmeen Esshaki, MS
Contact
yesshaki@health.ucsd.edu
858-246-8341
Fadel Zeidan, PhD
principal investigator · UC San Diego

Oversight

Data monitoring committee
No
FDA-regulated drug
Yes
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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Discussion

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Studies of the drug tested here: BRC-002

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