Saves the questions and what to expect into your notes, next to the visit they belong to.
Keep this study
Lead
Unity Health Toronto
Age
18–65
Sex
ALL
Healthy volunteers
Not accepted
You may be eligible if
1. 18 to 65 years of age
2. Meeting Diagnostic and Statistical Manual for Mental Disorders (DSM-5) criteria for Major Depressive Disorder (MDD)
3. Current major depressive episode as confirmed by the Mini International Neuropsychiatric Interview (MINI) for DSM-5
4. Experiencing moderate to severe depressive episode, as defined by the Hamilton Depression Rating Scale (HAMD)\>17
5. Failure of two trials of antidepressant therapy of adequate dose and duration, during the current depressive episode
6. For women of childbearing potential, use of highly effective or double-barrier methods of contraception. Abstinence is acceptable if it is the preferred and usual lifestyle of the female participant
7. Capacity to provide informed consent.
You may not be if
1. Acute suicidality defined as score ≥3 on HAMD item 3
2. Major Depressive Episode in people with Bipolar Disorder
3. Current substance abuse or dependence and/or history of alcohol abuse or dependence within the past year
4. Dementia
5. Current or lifetime history of schizophrenia or schizoaffective disorder
6. Current history of dissociative disorders
7. Known history of hypersensitivity or allergy to Nitrous Oxide, Midazolam or any ingredients in the study formulations
8. Contraindication to receiving nitrous oxide
9. Chronic cobalamin or folate deficiency
10. Contraindication to receiving the placebo midazolam
11. Use of centrally acting medicinal products, such as opioid agonists, morphine derivatives, benzodiazepines and/or other central nervous system depressants such as barbiturates and alcohol
12. Pregnancy or breastfeeding in female participants
13. Electroconvulsive therapy within the current depressive episode
14. Receiving ketamine treatment within the current depressive episode
15. Unwilling to maintain current antidepressant regimen.
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