A Phase 2 interventional study of Cannabis oil and Placebo in Pruritus, sponsored by University Hospital, Brest. Not yet recruiting at 6 sites in France. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2026-06-12.
Sponsored by University Hospital, Brest · Phase 2, Interventional, and Treatment
Chronic pruritus affects 10-20% of the population and causes a major reduction in quality of life, comparable to pain, with significant psychological, social, and functional consequences. Current treatments are often insufficient, highlighting the urgent need for new therapeutic options.
Recent advances in the pathophysiology of itch have shown the involvement of the endocannabinoid system (CB1, CB2, and TRPV1 receptors) in modulating itch signal transmission and cutaneous inflammation. Cannabinoids, particularly the balanced CBD:THC combination, appear promising as they provide both central and peripheral antipruritic effects, while CBD helps mitigate the psychotropic side effects of THC.
Preclinical studies and limited clinical data suggest efficacy across various forms of pruritus (dermatological, uremic, cholestatic), though robust controlled trials are still lacking. Evidence from nabiximols (1:1 CBD:THC spray) in other conditions such as neuropathic pain and spasticity further supports the rationale for this approach.
Therefore, sublingual LGP THC25:CBD25 oil has been selected for its balanced ratio, simple administration route, and expected tolerability, to evaluate its efficacy and safety in the treatment of chronic pruritus.
490 studies on the registry are indexed under Pruritus; 93 are open to participants now.
This study's planned enrollment of 218 is above the median of 60 across 422 interventional studies indexed under Pruritus.
Browse Pruritus studies →University Hospital, Brest is the lead sponsor of 601 studies on the registry; 136 are open to participants now.
Counted across the registry records on this site, refreshed daily.
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.
Exclusion Criteria:
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.
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.
GFR (glomerular filtration rate) is how much blood the kidneys filter each minute. It is usually estimated from a blood test — eGFR, by formulas such as CKD-EPI or MDRD — and some studies ask for it to be measured directly instead. Usually given in mL/min/1.73 m².
Check the method, the units and the minimum the study states. A value of 90 or above is in the normal-or-high range, but kidney damage can show in other tests too.
Able to become pregnant: from the first period until menopause, unless permanently unable to through surgery (removal of the womb, or of both ovaries or both fallopian tubes).
Criteria for people of childbearing potential usually ask for a negative pregnancy test and for contraception during the study and for a time after it.
Ways of preventing pregnancy. “Highly effective” methods fail less than 1% of the time a year when used correctly — for example an IUD or an implant.
Criteria usually say which methods count and how long to keep using them after the last dose, sometimes for male participants too. Some studies accept a partner’s vasectomy if it was confirmed successful and that person is the participant’s only sexual partner.
An allergy, or another reaction of the immune system, to a substance. “Hypersensitivity to the study drug” means a known allergic reaction to it — not every side effect a medicine can have.
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.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
GFR and eGFR (kidney filtering)
GFR (glomerular filtration rate) is how much blood the kidneys filter each minute. It is usually estimated from a blood test — eGFR, by formulas such as CKD-EPI or MDRD — and some studies ask for it to be measured directly instead. Usually given in mL/min/1.73 m².
Check the method, the units and the minimum the study states. A value of 90 or above is in the normal-or-high range, but kidney damage can show in other tests too.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Childbearing potential
Able to become pregnant: from the first period until menopause, unless permanently unable to through surgery (removal of the womb, or of both ovaries or both fallopian tubes).
Criteria for people of childbearing potential usually ask for a negative pregnancy test and for contraception during the study and for a time after it.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Contraception
Ways of preventing pregnancy. “Highly effective” methods fail less than 1% of the time a year when used correctly — for example an IUD or an implant.
Criteria usually say which methods count and how long to keep using them after the last dose, sometimes for male participants too. Some studies accept a partner’s vasectomy if it was confirmed successful and that person is the participant’s only sexual partner.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Hypersensitivity
An allergy, or another reaction of the immune system, to a substance. “Hypersensitivity to the study drug” means a known allergic reaction to it — not every side effect a medicine can have.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
CBD:THC oil 50mg/mL arm : An auto-titration phase will take place during the first 14 days of treatment: 0.2 ml on the first day then increase of 0.2 ml every 2 days in 2 daily doses, that is to say then only 0.1 per day , up to 1 ml/day maximum. If any tolerable side-effects occurred, patients were advised not to increase the dose; if intolerable side-effects occurred, dose reduction was advised. After initial titration, the dose will then be maintained for 4 consecutive weeks.
Drug: Cannabis oil
Placebo arm : An auto-titration phase will take place during the first 14 days of treatment with the same modalities as experimental group If any tolerable side-effects occurred, patients were advised not to increase the dose; if intolerable side-effects occurred, dose reduction was advised. After initial titration, the dose will then be maintained for 4 consecutive weeks.
Drug: Placebo
Patients in this arm will have to take Cannabis oil (50mg/mL) twice a day with the daily dose estimated during auto titration phase (from W0 to W2)
Patients in this arm will have to take Placebo oil twice a day with the daily dose estimated during auto titration phase (from W0 to W2)
WI-NRS change
Binary outcome (success or failure). Success is defined by a reduction of 30% in WINRS (Worst Itching Intensity Numerical Rating Scale - On a scale of 0 (no itch) to 10 (worst itch imaginable)) from the inclusion visit to week 6.
Time frame: Week 0
WI-NRS change
Binary outcome (success or failure). Success is defined by a reduction of 30% in WINRS (Worst Itching Intensity Numerical Rating Scale - On a scale of 0 (no itch) to 10 (worst itch imaginable)) from the inclusion visit to week 6.
Time frame: Week 6
WI-NRS change from W0 to W2
\- Proportion of patients achieving at least a weekly mean reduction of 4 points in WI-NRS (Worst Itching Intensity Numerical Rating Scale - On a scale of 0 (no itch) to 10 (worst itch imaginable)) score from inclusion visit to week 2
Time frame: Week 0
WI-NRS change from W0 to W2
\- Proportion of patients achieving at least a weekly mean reduction of 4 points in WI-NRS (Worst Itching Intensity Numerical Rating Scale - On a scale of 0 (no itch) to 10 (worst itch imaginable)) score from inclusion visit to week 2
Time frame: Week 2
WI-NRS change from W2 to W6
Proportion of patients achieving at least a weekly mean reduction of 4 points in WI-NRS (Worst Itching Intensity Numerical Rating Scale - On a scale of 0 (no itch) to 10 (worst itch imaginable)) score from week 2 to week 6.
Time frame: Week 2
WI-NRS change from W2 to W6
Proportion of patients achieving at least a weekly mean reduction of 4 points in WI-NRS (Worst Itching Intensity Numerical Rating Scale - On a scale of 0 (no itch) to 10 (worst itch imaginable)) score from week 2 to week 6.
Time frame: Week 6
ItchyQoL change from W0 to W2
\- Change in ItchyQoL score from inclusion (= Week 0) visit to week 2 (The ItchyQoL questionnaire contains 22 items, and each item is rated on a 5-point scale, ranging from 1 = never to 5 = all the time)
Time frame: Week 0
ItchyQoL change from W0 to W2
\- Change in ItchyQoL score from inclusion (= Week 0) visit to week 2 (The ItchyQoL questionnaire contains 22 items, and each item is rated on a 5-point scale, ranging from 1 = never to 5 = all the time)
Time frame: Week 2
ItchyQoL change from W2 to W6
\- Percent change in ItchyQoL score from Week 2 visit to week 6 (The ItchyQoL questionnaire contains 22 items, and each item is rated on a 5-point scale, ranging from 1 = never to 5 = all the time)
Time frame: Week 2
ItchyQoL change from W2 to W6
\- Change in ItchyQoL score from Week 2 visit to week 6.(The ItchyQoL questionnaire contains 22 items, and each item is rated on a 5-point scale, ranging from 1 = never to 5 = all the time)
Time frame: Week 6
Chronic Itch Burden Scale change from W0 to W2
\- Change in Chronic Itch Burden Scale - 10 from inclusion (= Week 0) visit to week 2 (10 questions rated from "Not at all" to "Very much" on patient itching)
Time frame: Week 0
Chronic Itch Burden Scale change from W0 to W2
\- Change in Chronic Itch Burden Scale - 10 from inclusion (= Week 0) visit to week 2 (10 questions rated from "Not at all" to "Very much" on patient itching)
Time frame: Week 2
Chronic Itch Burden Scale change from W2 to W6
\- Percent change in Chronic Itch Burden Scale - 10 from Week 2 visit to week 6 (10 questions rated from "Not at all" to "Very much" on patient itching)
Time frame: Week 2
Chronic Itch Burden Scale change from W2 to W6
\- Percent change in Chronic Itch Burden Scale - 10 from Week 2 visit to week 6 (10 questions rated from "Not at all" to "Very much" on patient itching)
Time frame: Week 6
Treatment adverse events
\- Incidence and severity of treatment-emergent adverse events.
Time frame: Week 0
Treatment adverse events
\- Incidence and severity of treatment-emergent adverse events.
Time frame: Week 2
Treatment adverse events
\- Incidence and severity of treatment-emergent adverse events.
Time frame: Week 4
Treatment adverse events
\- Incidence and severity of treatment-emergent adverse events.
Time frame: Week 6
Treatment adverse events
\- Incidence and severity of treatment-emergent adverse events.
Time frame: Week 8
Treatment Observance Rate
\- Number of observant patients (YES/NO) in both arms: Observance (defined as YES) is considered as taking at least one dose of treatment per day over the W0 - W6 period.
Time frame: Week 6
Plan to share: Undecided
No publications or documents are linked to this record.
Start is estimated for Jan 2027; primary completion for Mar 2029, 26 months later.
Of 52 phase 2 interventional studies under Pruritus, half reached primary completion within 16 months of starting (the median), counting those still running; a quarter within 10 and three quarters within 31. This study's planned 26 months is above that.
How these figures are worked out, and which studies are left out of them.
This study is not yet recruiting, as verified in Jun 2026. You cannot join it, but the record below documents what was studied.
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Studies of the drug tested here: Cannabis sativa flowering TOP