A Study of Inhaled Cannabidiol in Healthy Occasional Cannabis Users

Inclusion Criteria:

1. Between 21 and 65 years of age, inclusively;
2. Have used cannabis at least once in lifetime AND have used cannabis three days or less in the 28 days prior to enrollment;
3. Be able to provide a signed informed consent;
4. Willing to comply with study procedures and requirements as per protocol;
5. Have a forced expiratory volume in first second (FEV) sup 90 %;
6. Able to communicate and understand English or French language;

7. For female participants:

   a. Without childbearing potential, defined as: i. postmenopausal (12 months of spontaneous amenorrhea and ≥ 45 years of age); or ii. Documented surgically sterilized (i.e., tubal ligation, hysterectomy, or bilateral oophorectomy); or

   b. With childbearing potential: i. Must have negative pregnancy test result at screening and at subsequent visits.

ii. AND have no pregnancy plan while on the trial iii. AND must agree to use a medically accepted method of birth control throughout the study.

Exclusion Criteria:

1. Any disabling medical condition, as assessed by medical history, physical exam, vital signs and/or laboratory assessments that, in the opinion of the study physician, precludes safe participation in the study or the ability to provide fully informed consent;
2. Severe psychiatric condition (history of schizophrenia, schizoaffective disorder or bipolar disorder; current acute psychosis, mania or current suicidality based on the Mini International Neuropsychiatric Interview);
3. Any other disabling, unstable or acute mental condition that, in the opinion of the study physician, precludes safe participation in the study or ability to provide fully informed consent;
4. Current substance use disorder (except nicotine) according to Structured Clinical Interview for the Diagnostic and Statistical Manual of Mental Disorders-5 (SCID-V );
5. Currently pregnant, breastfeeding or planning to become pregnant either at screening or while enrolled in the study;
6. Pending legal action or other reason that, in the opinion of the study physician, might prevent study completion;
7. Use of medication within 7 days of experimental sessions, which, in the opinion of the Investigator, may interact with cannabis.
8. Participation in clinical trials or undergoing other investigational procedure involving cannabis or cannabinoids administration within 30 days prior to randomization