| Eligibility |
Inclusion Criteria:
Individuals eligible to be randomized in this protocol are those who meet all of the
following criteria:
1. Are 20 to 65 years old at the time of written informed consent at the In-Person
Screening visit
2. Are able to read, speak, and understand Swedish
3. Are able and willing to adhere to study requirements, including attending all study
visits, preparatory and follow-up sessions, and completing all study evaluations
4. Are able to swallow capsules
5. Women of childbearing potential (WOCBP) must agree to practice an effective means of
birth control throughout the duration of the study, from Screening through the Day 42
assessment
6. Meet ICD-10 criteria for a diagnosis of remitting major depressive disorder and are
currently experiencing a major depressive episode of
1. at least a 30-day duration at the time of the Screening
2. less than 5 years at time of Screening
7. Have sustained moderate-severe depression symptoms at Screening and Baseline, as
defined by a Screening MADRS total score = 22 and =30% and =7 point improvement (i.e.
decrease) in MADRS total score from web-screening to screening visit (assuming 3
points on item 1 at web screening).
9. Have an identified support person
a. Agree to be driven/accompanied home (or to an otherwise safe destination) by the support
person, or another responsible party, following dosing
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Exclusion Criteria:
Individuals not eligible to be randomized in this protocol are those who meet any of the
following criteria:
1. Women who are pregnant, as indicated by a positive urine pregnancy test at Screening
or Baseline. Women who intend to become pregnant during the study or who are currently
nursing.
2. Current depressive episode lasting >5 years
2. Unwilling or unable to discontinue formal psychotherapy 3. Ongoing antidepressant drug
treatment 4. Have previously during the current episode received the following
non-medication treatments:
a. deep brain stimulation (DBS) b. vagus nerve stimulation (VNS) 5. Currently receiving
electroconvulsive therapy (ECT) or transcranial magnetic stimulation (TMS) 6. Unable or
unwilling to discontinue any current medications that are known uridine diphosphate (UDP)
or glucuronosyltransferase (UGT) enzyme modulators (eg valproate)
- Note: Any prohibited agents must have been stopped at least 5x the elimination
half-life of the specific drug at the time of Baseline. See Appendix A for a full list
of prohibited medications.
7. Report psychedelic substances use ever
- Note: Psychedelic substances include psilocybin, Lysergic acid diethylamide (LSD),
mescaline (and natural products containing mescaline including peyote and San Pedro
cactus), N,N-Dimethyltryptamine (DMT), natural products containing DMT including
ayahuasca and 5-Methoxy-N,N-dimethyltryptamine (5-MeO-DMT), ibogaine, 2C compounds,
3,4-methylenedioxy- methamphetamine (MDMA), methylone or other psychedelics.
8. Have the following cardiovascular conditions:
a. coronary artery disease, congenital long QT syndrome (prior diagnosis), cardiac
hypertrophy, cardiac ischemia, congestive heart failure, myocardial infarction (prior
diagnosis); b. tachycardia (defined as heart rate > 100 beats per minute); c. a
clinically significant Screening ECG abnormality (e.g., atrial fibrillation); oNote: A
QTcF interval > 450 milliseconds is considered a clinically significant ECG
abnormality d. artificial heart valve; or e. any other significant current or history
of cardiovascular condition, based on the clinical judgment of study physician, that
would make a participant unsuitable for the study 9. At Screening or Baseline have
elevated blood pressure as defined as:
a. Screening blood pressure SBP >135 mmHg or DBP > 85 mmHg on three separate readings;
or b. Baseline blood pressure SBP >140 mmHg or DBP > 90 mmHg on three separate
readings 10. Have a history of stroke or Transient Ischemic Attack (TIA) 11. Have
moderate to severe hepatic impairment, as indexed by a Child-Pugh score = 7 12. Have
epilepsy 13. Have insulin-dependent diabetes
- Note: Participants who are taking oral hypoglycemic agent and have a history of
hypoglycemia requiring medical intervention will be excluded 14. Are unable or
unwilling to adhere to the following medication requirements:
1. Agree to suspend sildenafil (Viagra®), tadalafil, or similar medications at least
72 hours prior to dosing
2. If taking any supplement containing >20 mg of niacin, agrees to suspend use for
the duration of the study 15. Have a positive urine drug test including
Amphetamines, Barbiturates, Buprenorphine, Benzodiazepines, Cocaine, Cannabis,
Methamphetamine, MDMA, Methadone, Opiates (Morphine, Oxycodone), Phencyclidine
(PCP), and Tetrahydrocannabinol (THC). Exceptions are made for prescribed
Benzodiazepines (stable dose for sleep or anxiety).
- Note: Benzodiazepine medications for sleep and non-benzodiazepine sleeping medications
will be allowed to continue through the study period for participants who have been on
a stable dose of such a medicine for at least 6 weeks prior to Screening, as
determined during review of concomitant medications
- Note: Participants using cannabis, including legal cannabis, for any purposes will be
excluded
- Note: Participants who are taking prescription maintenance methadone or buprenorphine
naloxone will be excluded
- Note: Prescription opiates must have been stopped at least 5x the elimination half-
life of the specific drug at the time of inclusion, as confirmed with a negative urine
drug screen.
16. Nicotine dependence that would disallow an individual to be nicotine free for the
7-10 hours during the dosing period 17. Meet ICD-10 criteria for schizophrenia
spectrum or other psychotic disorders, including MDD with psychotic features (except
substance/medication-induced or due to another medical condition), or Bipolar I
Disorder, Bipolar II Disorder and bipolar disorder NOS.
- Note: Participants with any lifetime diagnosis of schizophrenia spectrum or other
psychotic disorders will be excluded 18. Meet ICD-10 criteria for antisocial
personality disorder 19. Meet ICD-10 criteria for a moderate or severe alcohol or drug
use disorder (excluding caffeine)
- Note: Participants with a diagnosis of alcohol or drug use disorder within the past 12
months will be excluded 20. Have presence of any psychiatric condition or symptom
judged by the PI (or designee) to be a more significant clinical problem than MDD for
the participant.
21. Have a first-degree relative with schizophrenia spectrum or other psychotic
disorders (except substance/medication-induced or due to another medical condition),
or Bipolar I Disorder 22. Have a psychiatric condition judged to be incompatible with
establishment of rapport with the Facilitators or safe exposure to psilocybin 23.
Report the following suicidal ideation or suicidal thoughts defined as:
a. Have a score of = 5 on Item 10 (suicidal thoughts) of the central-rater or computer
administered MADRS at Screening or Baseline; or b. Have any suicidal ideation or
thoughts, in the opinion of the study physician or PI, that presents a serious risk of
suicidal or self-injurious behavior at any time prior to randomization 24. Have any
suicidal ideation or thoughts, in the opinion of the study physician or PI, that
presents a serious risk of suicidal or self-injurious behavior 25. Have any physical
or psychological symptom, medication or other relevant finding at Screening or
Baseline, based on the clinical judgment of clinical/medical study personnel, that
would make a participant unsuitable for the study.
26. Have an allergy or intolerance to any of the materials contained in either drug
product 27. Have Hepatitis B, C or HIV 28. Have one or more pathological blood test
results as defined in 5.6.3 (as determined by a study physician; with the exception of
CRP).
29. Have peptic ulcer (ICD 10 K25 or K26)
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