Exercise to reduce work-related fatigue among employees: a randomized controlled trial.
Juriena D de Vries, Madelon L M van Hooff, Sabine A E Geurts...
https://pubmed.ncbi.nlm.nih.gov/28323305/Actively Recruiting
Led by Christopher D. Verrico · Updated on 2026-05-18
75
Participants Needed
1
Research Sites
52 weeks
Total Duration
Researchers are evaluating the safety and potential pain-reducing effects of dronabinol, a synthetic form of THC, in adults with chronic low back pain. This exploratory, double-blind, placebo-controlled, randomized study aims to gather early evidence on whether dronabinol is safe enough to justify larger clinical trials. The study focuses on chronic low back pain lasting at least three months and occurring frequently over the past six months. Participants will be randomly assigned in a 21 ratio to receive either dronabinol capsules or matching placebo capsules twice daily for eight weeks. The dronabinol dose starts at 2.5 mg twice on the first day and may be gradually increased up to 30 mg per day as tolerated. Placebo participants will undergo a similar dosing schedule to maintain blinding. This single-site study does not include interim analyses or stratifications. During the study, participants will be monitored for pain intensity and adverse events from baseline through eight weeks. Researchers will also track analgesic use, mood, and patient-reported outcomes using questionnaires. Safety assessments include regular clinical evaluations and laboratory tests. Participants must remain on stable opioid regimens if applicable and avoid adding new pain medications. The total participation duration is eight weeks, with close observation throughout the study period.
CONDITIONS
Dronabinol as an Adjunct for Reducing Pain
C
Christopher D Verrico, PhD
A
Adetola O Vaughan, MA
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Christopher D. Verrico
Lead Sponsor
This table compares participation in this trial with other options available for this condition. The information is drawn from published research and the trial’s study details and is provided for educational purposes only.
| Factors | Dronabinol (oral, titrated up to 30 mg THC daily) | Placebo (oral, matched titration) |
|---|---|---|
| What is it? | Participants receive oral dronabinol, with daily dosing titrated up to a maximum of 30 mg THC as tolerated. | Participants receive a matched oral placebo, with titration mimicking the active treatment schedule. |
| Role in the trial | Investigational treatment arm assessing pain reduction and safety of dronabinol as an adjunct to stable opioid therapy. | Control arm used for comparison to evaluate the efficacy and safety of dronabinol. |
| Primary use | Investigated for reducing pain intensity in adults with chronic low back pain refractory to opioid therapy. | Serves as a comparator to measure changes in pain and safety outcomes relative to dronabinol. |
| How is it given or performed? | Oral capsules starting at 2.5 mg twice on Day 1; dose may increase daily as tolerated up to a total of 30 mg THC per day. | Oral capsules matching the appearance and titration schedule of the active treatment. |
| Evidence status | Prior meta-analyses of cannabinoids for chronic pain suggest modest benefit, but evidence remains uncertain with variable results and frequent adverse events; this trial aims to clarify dronabinol's role as an adjunct for back pain. | Placebo response is expected in blinded pain trials; current trial data will establish comparative outcome. |
| Important limitations | Cannabinoid trials for chronic pain report frequent side effects such as drowsiness, dizziness, gastrointestinal symptoms, and inconsistencies in pain reduction. Effects in opioid-treated populations are not fully established. | Placebo arm does not reflect active current-care or non-drug strategies; blinded design may lead to participant dropouts or unblinding if side effects differ. |
Disclaimer: This comparison is created with the help of artificial intelligence(AI) and may contain errors or missing information. It is not medical advice and does not mean one option is better or safer than another. Clinical trials are still being studied, and joining a trial is your choice. Please consult your healthcare professional before making any decisions.
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Duration - 2 to 4 weeks
Participants are screened for eligibility to participate in the trial.
1 visit (in-person)
Duration - 8 weeks
Participants take oral capsules of dronabinol or placebo. The dose starts at 2.5 mg twice on Day 1 and may be increased daily as needed up to 30 mg per day. Treatment lasts for 8 weeks.
Regular visits during treatment for dose titration and monitoring
Study Type
INTERVENTIONAL
Masking
QUADRUPLE
Allocation
RANDOMIZED
Model
PARALLEL
Primary Purpose
TREATMENT
Number of Arms
2
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https://pubmed.ncbi.nlm.nih.gov/26767993/Christopher D. Verrico
Lead Sponsor