Study of the Safety and Efficacy of Nabiximols Oromucosal Spray Versus Placebo in Patients With Post-traumatic Stress Disorder

Is at risk of suicide as evidenced by a history of suicide attempt(s) in the 2 years prior to Visit 1 or answering yes on item 4 or 5 of the Columbia-Suicide Severity Rating Scale (C-SSRS) in the month prior to Visit 1

Is currently involved in any legal action that relates to the diagnosis of PTSD or the traumatic events that gave rise to the disease

Has cognitive impairment that in the opinion of the investigator may interfere with participation in the study or ability to complete assessments or report treatment effects

Has any history of psychosis (including schizophrenia, schizophreniform disorder, schizoaffective disorder, or substance-induced psychosis), or bipolar disorder based on an assessment using the MINI.

Participants who have an index trauma before age 18 and no other traumatic experiences which could relate/identify as being part of their PTSD

Has taken cannabis or a cannabis derived product for medicinal or recreational purposes at any time in the past and developed significant adverse experiences related to cannabis use per history and investigator judgment

Has severe depressive symptoms as per the investigator's judgment or a score ≥ 20 on the Patient Health Questionnaire-9 (PHQ-9) at Visit 1

Has a history of any degree of DSM-5 cannabis or other substance use disorder, or moderate to severe alcohol use disorder within 6 months prior to Visit 1. Participants with Nicotine Use Disorder are allowed to enroll.

Has any known or suspected hypersensitivity to cannabinoids or any of the excipients of the investigational medicinal product

Has recently taken nabiximols, cannabis, or a cannabis-derived product for medicinal or recreational purposes as reflected by a positive Δ9-tetrahydrocannabinol (THC) urine test at Visit 1

Currently taking 1 of a number of specified psychotropic medications, where there is a potential for pharmacodynamic interactions. Participants taking any medication with psychoactive properties not currently on the list of prohibitive medications may be considered for enrollment only after consultation with a GW medical representative.

Has experienced myocardial infarction or clinically significant cardiac dysfunction within the 12 months prior to Visit 1 or has a cardiac disorder that, in the opinion of the investigator, would put the participant at risk of a clinically significant arrhythmia or myocardial infarction

Positive serology panel (including hepatitis B surface antigen \[HBsAg\] and hepatitis C virus \[HCV\] antibody)

Positive human immunodeficiency virus (HIV) antibody/p24 antigen screens

Has a diastolic blood pressure of \< 50 millimeters of mercury (mmHg) or \> 105 mmHg or systolic blood pressure \< 90 mmHg or \> 150 mmHg (when measured in a sitting position at rest for 5 minutes) or a postural drop in the systolic blood pressure of \> 20 mmHg at Visit 1

Has clinically significant impaired renal function at Visit 1, as evidenced by an estimated creatinine clearance lower than 50 milliliters per minute (mL/min)

Has serum alanine aminotransferase (ALT) or aspartate aminotransferase (AST) \> 2 × upper limit of normal (ULN) at Visit 1

Male and fertile (i.e., after puberty unless permanently sterile by bilateral orchiectomy) unless willing to ensure that he uses male contraception (condom or vasectomy) or remains sexually abstinent during the trial and for 3 months thereafter

Female and of childbearing potential (i.e., following menarche and until becoming postmenopausal for ≥ 12 consecutive months unless permanently sterile by hysterectomy, bilateral salpingectomy, or bilateral oophorectomy) unless willing to ensure that she uses a highly effective method of birth control (e.g., intrauterine device/hormone-releasing system, bilateral tubal occlusion, vasectomized partner, or sexual abstinence) during the trial and for 3 months thereafter. Participants using combined hormonal methods or a progestogen-only pill or injection or implant should use an additional barrier method such as a male condom or diaphragm during the trial and for 3 months thereafter.

Female and pregnant (positive pregnancy test at Visit 1), lactating, or planning pregnancy during the course of the trial or within 3 months thereafter

Has participated in an interventional or non-interventional clinical trial within the 30 days prior to Visit 1

Has donated blood during the 3 months prior to Visit 1 and is unwilling to abstain from donation of blood during the trial

Has been previously randomized into this trial

Any abnormalities identified following a physical examination, clinical laboratory, serology, or other applicable screen procedures that, in the opinion of the investigator, would jeopardize the safety of the participant or the conduct of the study if they took part in the trial

Participants who are currently participating in a trauma-focused psychotherapy are ineligible to participate in the trial. Participants who are participating in other forms of psychotherapy (or none at all) must agree to continue (or not start) therapy during the trial.

Additional exclusion criterion at Visit 2 (Day 1, pre-randomization):

Exhibited a CAPS-5 score \< 27 at Visit 2, or a reduction in CAPS-5 score of ≥ 30% at Visit 2 relative to Visit 1

Did not complete the writing exercise during the screening period

What this study is about