A Phase 1/2 interventional study of Cannabidiol oral solution and Placebo in Cannabis Use Disorder, sponsored by Medical University of South Carolina. Recruiting at 1 site in United States. Open to participants aged 18 Years to 25 Years. Per ClinicalTrials.gov, last updated 2025-11-05.
Sponsored by Medical University of South Carolina · Phase 1/2, Interventional, and Treatment
The interface between cannabis use and stress is a particularly important focus for sex differences research in emerging adults. Given the dynamics at play in this critical stage when cannabis use is most prevalent, developmentally informed research is needed to guide tailored clinical interventions. This study will apply rigorous and innovative methods to elucidate sex differences in the nexus of cannabis use and stress among emerging adults with cannabis use disorder to guide the development of tailored treatments.
Among the physiological systems most important to brain development in emerging adulthood is the endocannabinoid system, which among other roles facilitates cognitive and behavioral processing, including the underpinnings of stress management and resiliency. Sex differences in endocannabinoid system development have been identified, and emerging evidence indicates a bidirectional relationship between stress exposure and the endocannabinoid system during emerging adulthood. Repeated exposure to exogenous cannabinoids, such as those administered via cannabis use, perturbates endocannabinoid system development, which may adversely affect the programming of future coping in a manner that differs by sex. Use of cannabis, which exerts its psychoactive effects via delta-9-tetrahydrocannabinol binding to endocannabinoid receptors, is more common among emerging adults than in any other age group. Many regular users develop a maladaptive, impairing pattern of use characterized as cannabis use disorder (CUD). A constellation of preliminary evidence suggests several factors disproportionately complicate CUD in females compared to males; the salience of these factors in emerging adulthood indicates that this developmental stage deserves focused sex differences research to inform clinical management. A central running thread is the importance of stress and stress-reactivity across endocannabinoid system development, cannabis use, CUD, cannabis withdrawal, and relapse to cannabis use. This study combines rigorous ecological momentary assessment (EMA), controlled human laboratory procedures, and innovative bioassay collection. Emerging adult cannabis users with CUD (ages 18-25, N=148, 1:1 female to male ratio) will undergo 3 days of reinforced abstinence with EMA monitoring of cannabis withdrawal and stress-related symptoms, followed by a standardized laboratory stress induction paradigm. Blood levels of endocannabinoid system markers will be assessed before and after the abstinence period; during the lab session, self-report measures and biomarkers of stress reactivity will be collected. Double-blind cannabidiol (CBD) versus placebo dosing before the laboratory stress paradigm will allow for examination of effects on stress response during withdrawal. Prior work indicates CBD administration reduces stress response in general populations and preliminary research suggests this effect may extend to cannabis users; this has not been rigorously applied to induced stress amid cannabis withdrawal in emerging adults with CUD, a context particularly important for females with CUD who often report using cannabis to cope with stress. Following the laboratory session, EMA monitoring will resume as participants return to ad libitum cannabis use, providing the opportunity to test associations between stress reactivity and time to resumption of use. The proposed study is designed to elucidate sex differences and guide the development of tailored treatments that address factors disproportionately affecting emerging adult females with CUD.
188 studies on the registry are indexed under Marijuana Abuse; 26 are open to participants now.
This study's planned enrollment of 148 is above the median of 51 across 160 interventional studies indexed under Marijuana Abuse.
Browse Marijuana Abuse studies →Medical University of South Carolina is the lead sponsor of 874 studies on the registry; 166 are open to participants now.
Of its 131 completed or terminated interventional studies of FDA-regulated products, 104 (79%) have results posted.
Compared within Marijuana Abuse, the registry's first condition term, which may not be this study's main condition. Counted across the registry records on this site, refreshed daily. How we classify →
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.
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.
Weight in kilograms divided by height in metres squared. Example: 70 kg and 1.75 m gives 70 ÷ (1.75 × 1.75) ≈ 22.9.
What counts as overweight or obesity differs between countries (some use lower cut-offs), so go by the range the study states.
Two enzymes measured in a routine blood test of the liver. Higher levels can mean the liver is under strain or damaged. SGPT and SGOT are older names for ALT and AST.
Criteria usually give a limit as a multiple of the upper limit of normal (ULN), often higher when cancer has spread to the liver.
A yellow substance made when red blood cells are broken down, which the liver clears. A high level can mean a problem with the liver or the bile ducts.
Criteria often allow more for people with Gilbert’s syndrome, a harmless inherited condition that raises bilirubin.
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.
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.
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.
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.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
BMI (body mass index)
Weight in kilograms divided by height in metres squared. Example: 70 kg and 1.75 m gives 70 ÷ (1.75 × 1.75) ≈ 22.9.
What counts as overweight or obesity differs between countries (some use lower cut-offs), so go by the range the study states.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
ALT and AST (liver enzymes)
Two enzymes measured in a routine blood test of the liver. Higher levels can mean the liver is under strain or damaged. SGPT and SGOT are older names for ALT and AST.
Criteria usually give a limit as a multiple of the upper limit of normal (ULN), often higher when cancer has spread to the liver.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Bilirubin
A yellow substance made when red blood cells are broken down, which the liver clears. A high level can mean a problem with the liver or the bile ducts.
Criteria often allow more for people with Gilbert’s syndrome, a harmless inherited condition that raises bilirubin.
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.
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.
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.
Cannabidiol 800 mg will be administered orally once in the laboratory prior to a stress induction paradigm.
Drug: Cannabidiol oral solution
Placebo (formulated to appear identical to active condition) administered orally once in the laboratory prior to a stress induction paradigm.
Drug: Placebo
Double-blind cannabidiol oral solution 800 mg administered once
Double-blind placebo oral solution administered once
Cannabis withdrawal symptoms
Cannabis Withdrawal Scale score (Allsop et al., 2011) \[minimum score 0 and maximum score 190; higher score means a worse outcome\]
Time frame: Assessed after 3-day cannabis abstinence period
Stress reactivity
Within Session Rating Scale - Stress score (Childress et al., 1986) \[minimum score 0 and maximum score 10; higher score means a worse outcome\]
Time frame: Measured 5 minutes after laboratory-administered Trier Social Stress Task
Time to resumption of cannabis use
After 3-day abstinence phase and laboratory session, ecological momentary assessment will be conducted twice daily for a 10-day span. Participants may resume ad lib cannabis use, and will be prompted to self-report the day/time that they resume cannabis use \[minimum score 0 and maximum score 10 days, with the possibility of no resumption at all; higher score means a better outcome, and no resumption at all by the end of the 10 days is the best possible outcome\]
Time frame: Measured as the time span from laboratory session to time of resumption of ad lib cannabis use (maximum of 10 days)
Plan to share: Undecided — A final de-identified data set will be made available for retrieval and analysis.
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Studies of the drug tested here: Cannabidiol
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