Largo, Florida 33770

  • Schizophrenia


This study will be conducted to evaluate the efficacy, safety, and tolerability of GWP42003-P versus placebo in participants with schizophrenia experiencing inadequate response to ongoing antipsychotic treatment.


Inclusion Criteria: - Male or female 18 to 50 years of age at the time of signing the Informed Consent Form (ICF) - Willing and able to give informed consent for participation in the trial - Diagnostic and Statistical Manual of Mental Disorders (DSM-5) diagnosis of schizophrenia, confirmed by the Mini International Neuropsychiatric Interview (MINI) - Clinically stable outpatient - PANSS-T score of ≥ 60 and < 110 at screening and baseline visits - Score of ≥ 4 for at least 2 of the following PANSS items: delusions (P1), conceptual disorganization (P2), hallucinatory behavior (P3), suspiciousness (P6), or unusual thought content (G9) at screening and baseline visits - Score ≥ 4 (at least moderately ill) on the Clinical Global Impression of Severity (CGI-S) at screening and baseline visits. - Undergoing treatment with at least 1 antipsychotic medication with no change in dosing, supported by documentation, for at least 8 weeks prior to screening and no change in antipsychotic medication dosing planned throughout the trial - Documented response (at least partially) to treatment with current antipsychotic medications (e.g., treatment of recent exacerbation of psychotic symptoms) - On a stable dose if taking concomitant psychotropic medications and within allowed limits, including antidepressants, anxiolytics, anticholinergics and/or antiepileptics for at least 8 weeks prior to screening. Valproic acid or any prescribed valproate product (valproate semisodium or valproate sodium) is disallowed within 4 weeks (i.e., more than 5 half lives) prior to the baseline visit. Exclusion Criteria: Diagnosis and Psychiatric History - Recent (within the last 6 months) diagnosis of panic disorder, depressive episode, or other comorbid psychiatric conditions based on the MINI (or DSM-5) or has PANSS item G6 score of ≥ 5 (depression) - Any psychiatric disorder that may interfere with the conduct of this trial, including but not limited to attention deficit hyperactivity disorder, pervasive developmental disorder, intellectual disability, personality disorder that might interfere with compliance or increase suicidal risk, manic or hypomanic episode, or any other psychotic disorder, as defined in the DSM-5 - Any history of suicidal behavior or any suicidal ideation of type 4 or 5 on the adult C-SSRS or within 1 month prior to screening Treatment History - Treatment-resistant schizophrenia as judged by the treating physician, as defined by having previously failed > 2 therapeutic antipsychotic trial medications i.e.: 1. At least 6 weeks duration of treatment at therapeutic doses; 2. Two different classes of antipsychotic medications; 3. Or required clozapine therapy due to non-response to antipsychotic therapy within the previous 5 years. - Based on the investigator assessment, current antipsychotic medication blood levels are below the therapeutic range (only applicable when therapeutic drug monitoring is available for the antipsychotic[s] prescribed for the participant) Past and Current Medical History - History of moderate or severe head trauma (for example, loss of consciousness for more than 15 minutes) or other neurological disorders (including epilepsy), neurodegenerative disorder (Alzheimer's disease, Parkinson's disease, multiple sclerosis, Huntington's disease, etc.) or systemic medical diseases that are, in the opinion of the investigator, likely to interfere with the conduct of the trial or confound the trial assessments - Tardive dyskinesia (TD) that is moderate to severe (i.e., a score of > 21 on the dyskinesia subscale of the Extrapyramidal Symptom Rating Scale [ESRS]) or requires treatment - Any other significant disease, disorder, pending court proceedings or social circumstances which, in the opinion of the investigator, may either put the participant at risk because of participation in the trial, may influence the result of the trial, or may affect the participant's ability to take part in the trial Other - Any known or suspected hypersensitivity to cannabinoids or any of the excipients of the investigational medicinal product, such as sesame seed oil - One or more laboratory values outside the normal range, based on the blood or urine samples taken at the screening visit, that are considered by the investigator to be clinically significant; or impaired hepatic function at screening, defined as serum alanine aminotransferase (ALT) or aspartate aminotransferase (AST) > 2 × upper limit of normal (ULN) or total bilirubin (TBL) > 1.5 × ULN or international normalized ratio (INR) > 1.2 (TBL ULN parameter not applicable for participants diagnosed with Gilbert's disease) - Currently using or within 3 months of screening has used cannabidiol (CBD) oil or purified CBD preparations and is unwilling to abstain for the duration of the trial



Primary Contact:

Medical Information
Phone: +44 (0) 1223 266 800

Backup Contact:

Medical Information
Phone: (833) 424-6724

Location Contact:

Largo, Florida 33770
United States

There is no listed contact information for this specific location.

Site Status: Recruiting

Data Source:

Date Processed: September 19, 2021

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