About this trial
This study will seek to determine the (1) acceptability and (2) feasibility of psilocybin as an adjunct to cognitive-behavioral therapy, delivered as a group treatment (G-PACBT) for major depressive disorder and (3) explore the clinical effects of G-PACBT on depressive symptoms and psychosocial functioning.
Eligibility criteria
This trial does not accept healthy volunteersQualifiers
Ages 21-60,
Fluent in English
Able to swallow capsules,
Meets for a current major depressive episode or a history of major depressive episodes based on the DSM-5 criteria (American Psychiatric Association, 2013),
Disqualifiers
A personal or family history (first-degree) of psychosis or mania
Resting blood pressure above 140 systolic, 90 diastolic or heart rate > 90 beats per minute (averaged across four separate measurements)
Meeting criteria for a DSM-5 cluster B personality disorder (narcissistic, histrionic, borderline, antisocial personality disorder),
Active suicidality (i.e., HAM-D item 3 score of greater than 3) or other psychiatric disturbance requiring acute treatment
Trial design
Single group
Treatments tested in this trial
Psilocybin (drug)
DrugTwo administrations of psilocybin, administered orally (a 10mg dose followed by a 25mg dose one month later)
Group Cognitive Behavioral Therapy
Behavioral12 sessions of PA-CBT (as manualized by our research team; Weintraub et al., 2023)
Treatment groups
Trial outcomes
Primary outcomes
Treatment acceptability
Treatment acceptability as measured by the participant on the Client Satisfaction Questionnaire-8. Total scores range from 8 to 32, with the higher number indicating greater satisfaction.
Feasibility as measured by participant retention
Participant retention over the treatment
Hamilton Depression Rating Scale
Depressive symptom severity scored from 0-53, with larger values indicating greater depressive severity
Sponsors and contacts
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