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CompletedNCT04387617Updated Jan 18, 2023Results posted

A Study to Assess the Effect of Cannabidiol Oil on Pain After Ureteroscopy for Kidney Stones

A Phase 2/3 interventional study of Cannabidiol and Placebo in Urinary Stone, sponsored by Mayo Clinic. Completed at 1 site in United States. Open to participants aged 18 Years to 75 Years. Per ClinicalTrials.gov, last updated 2023-01-18.

Sponsored by Mayo Clinic · Phase 2/3, Interventional, and Supportive care

Phase
Phase 2/3
Study type
Interventional
Enrollment
90
Allocation
Randomized
Ages
18 Years to 75 Years
Sex
All
01

Study summary

The purpose of this study is to determine if CBD oil has any effect on decreasing postoperative pain control following ureteroscopy for urinary stone disease, and to determine if CBD oil has any effect in decreasing the amount of postoperative opioids (commonly used drug) used by patients after undergoing ureteroscopy for urinary stone disease.

02

Conditions studied

  • Urinary Stone
03

In context

Urinary Calculi

159 studies on the registry are indexed under Urinary Calculi; 29 are open to participants now.

This study's enrollment of 90 is below the median of 112 across 108 interventional studies indexed under Urinary Calculi.

Browse Urinary Calculi studies →

Lead sponsor

Mayo Clinic is the lead sponsor of 3,218 studies on the registry; 670 are open to participants now.

Of its 445 completed or terminated interventional studies of FDA-regulated products, 313 (70%) have results posted.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

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

Inclusion criteria

  • Patients who are diagnosed with kidney or ureteral stones confirmed on imaging (CT of the abdomen and pelvis) and who elect for definitive treatment via ureteroscopy at two sites within a tertiary care institution.
  • Age 18-75 years of age.
  • Patients of either gender.
  • Patients of all ethnic backgrounds.
  • Capable of giving informed consent.
  • Capable and willing to fulfill the requirements of the study.

Exclusion criteria

Exclusion Criteria:

  • History of chronic pain.
  • Chronic use of opioid or other pain medication (> 12 weeks).
  • Known allergy to CBD oil or other cannabinoids.
  • Known or suspected pregnancy.
  • Inability to give informed consent or unable to meet requirements of the study for any reason.
  • Bilateral ureteroscopy.
  • Current marijuana, cannabidiol (CBD), or dronabinol use.
  • Liver disease/cirrhosis.
  • Current treatment of seizures with clobazam, valproate, or other antiepileptic medications.
05

Study design

Phase
Phase 2 / Phase 3
Primary purpose
Supportive care
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Double (Participant, Investigator)
Enrollment
90 participants (actual)

Study arms

  • Experimental
    CBD Oil Group

    Drug: Cannabidiol

  • Placebo comparator
    Control Group

    Drug: Placebo

Interventions

  • DrugCannabidiol

    The product is a liquid formulation that will be prescribed at a dosage of 20 mg per day for a total of 3 days.

    Also known as: Epidiolex

  • DrugPlacebo

    The product is a liquid formulation placebo that will be prescribed at an equivalent volume as active drug for 3 days

06

What researchers measure

Primary outcomes

  1. Maximum Pain Intensity Score

    Patient self-reported maximum pain intensity score measured by the Visual Analogue Scale (VAS) rated from 0-10, where 0 was no pain and 10 was the worst pain imaginable.

    Time frame: postoperative Day 3

Secondary outcomes

  1. Postoperative Rescue Narcotic Use

    The number of subjects who required rescue narcotic use post ureteroscopy

    Time frame: postoperative Day 3

  2. Total Urinary Symptoms Score

    Patient self-reported urinary symptoms measured by the Ureteric Stent Symptoms Questionnaire (USSQ) urinary symptoms section. Following insertion of the stents, subjects were asked to answer 11 questions regarding their urinary symptoms. 9 questions used a score of 1 to 5, where 1 was never and 5 was all of the time. 1 question used a score of 1 to 4, where 1 was do not see any blood and 4 was urine is heavily blood stained. 1 question used a score of 1 to 7, where 1 was delighted and 7 was terrible. Total sum of all 11 questions for a total score ranging from 11 - 56, lower scores reflected fewer symptoms and higher satisfaction where higher scores reflected more symptoms and less satisfaction.

    Time frame: postoperative day 1 and postoperative day 3

  3. The Number of Subjects With Adverse Events

    The count of subjects who experienced adverse events

    Time frame: 3 days post-ureteroscopy

07

Results

Posted Jan 18, 2023

Participant flow

Participant flow — Overall Study
MilestoneCBD Oil GroupControl Group
Started4545
Completed4545
Not completed00

Outcome measures

PrimaryMaximum Pain Intensity Score

Patient self-reported maximum pain intensity score measured by the Visual Analogue Scale (VAS) rated from 0-10, where 0 was no pain and 10 was the worst pain imaginable.

Time frame:
postoperative Day 3
Reported as:
Mean · score on a scale
Maximum Pain Intensity Score
score on a scaleCBD Oil GroupControl Group
Maximum Pain Intensity Score3.6 ± 2.43.2 ± 2.8
Statistical analysis
  • CBD Oil Group vs Control Group · t-test, 2 sided · p = 0.5 · Mean difference (final values): 0.4 · 95% CI -0.8 to 1.6
SecondaryPostoperative Rescue Narcotic Use

The number of subjects who required rescue narcotic use post ureteroscopy

Time frame:
postoperative Day 3
Reported as:
Count of participants · Participants
Postoperative Rescue Narcotic Use
ParticipantsCBD Oil GroupControl Group
Postoperative Rescue Narcotic Use89
SecondaryTotal Urinary Symptoms Score

Patient self-reported urinary symptoms measured by the Ureteric Stent Symptoms Questionnaire (USSQ) urinary symptoms section. Following insertion of the stents, subjects were asked to answer 11 questions regarding their urinary symptoms. 9 questions used a score of 1 to 5, where 1 was never and 5 was all of the time. 1 question used a score of 1 to 4, where 1 was do not see any blood and 4 was urine is heavily blood stained. 1 question used a score of 1 to 7, where 1 was delighted and 7 was terrible. Total sum of all 11 questions for a total score ranging from 11 - 56, lower scores reflected fewer symptoms and higher satisfaction where higher scores reflected more symptoms and less satisfaction.

Time frame:
postoperative day 1 and postoperative day 3
Reported as:
Mean · score on a scale
Total Urinary Symptoms Score
score on a scaleCBD Oil GroupControl Group
Postoperative day 131 ± 5.533 ± 6.6
Postoperative day 327 ± 5.827 ± 6.9
SecondaryThe Number of Subjects With Adverse Events

The count of subjects who experienced adverse events

Time frame:
3 days post-ureteroscopy
Reported as:
Count of participants · Participants
The Number of Subjects With Adverse Events
ParticipantsCBD Oil GroupControl Group
Nausea32
Constipation109
Diarrhea31
Poor appetite84
Poor sleep115
Drowiness118
Dizziness75
Tiredness1713
Itching22
Headache44

Adverse events

Collected over Adverse events were collected from each subject from baseline to end of study for a total of 3 days. Non-serious events are listed at a 0% frequency threshold.

Adverse event summary by group
GroupDeathsSeriousOther
CBD Oil Group0/45 (0%)0/45 (0%)24/45 (53.3%)
Control Group0/45 (0%)0/45 (0%)21/45 (46.7%)
Most frequent other events
Most frequent other events
EventCBD Oil GroupControl Group
TirednessGeneral disorders17/4513/45
Poor sleepPsychiatric disorders11/455/45
DrowsinessNervous system disorders11/458/45
ConstipationGastrointestinal disorders10/459/45
Poor AppetiteMetabolism and nutrition disorders8/454/45
DizzinessNervous system disorders7/455/45
HeadacheNervous system disorders4/454/45
NauseaGeneral disorders3/452/45
DiarrheaGastrointestinal disorders3/451/45
ItchingSkin and subcutaneous tissue disorders2/452/45

Baseline characteristics

Age, Continuous
Age, Continuous(years)CBD Oil GroupControl GroupTotal
Mean61.0 ± 12.358.0 ± 14.459.7 ± 13.37
Sex: Female, Male
Sex: Female, Male(Participants)CBD Oil GroupControl GroupTotal
Female282755
Male171835
Race and Ethnicity Not Collected
Race and Ethnicity Not Collected(Participants)CBD Oil GroupControl GroupTotal
Count of participants——0
Region of Enrollment
Region of Enrollment(participants)CBD Oil GroupControl GroupTotal
United States454590
08

Study locations

1 site
  • Mayo Clinic in Arizona
    Phoenix, Arizona 85054, United States
09

References and documents

Study documents

  • Protocol and statistical analysis plan · Oct 16, 2020

Documents are hosted by the registry — open the source record to download them.

Individual participant data

Plan to share: No

10

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Jan 18, 2023, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
11

Registry details

Key details

Study ID
NCT04387617
Lead sponsor
Mayo Clinic
Responsible party
Karen L. Stern (Principal Investigator, Mayo Clinic) — Principal investigator
First posted
May 14, 2020
Start date
Feb 15, 2021
Primary completion
Jan 31, 2022
Completion
Jan 31, 2022
Results posted
Jan 18, 2023
Last update
Jan 18, 2023

Study contacts

Karen Stern, MD
principal investigator · Mayo Clinic

Oversight

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

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