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Monnica T. Williams

University of Ottawa, Ottawa University

40 papers in the library · 1,584 citations · publishing 2018-2026

Papers

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Longitudinal peripheral DNA methylation remodeling following ketamine-assisted psychotherapy in major depressive disorder

Epigenetics October 15, 2026 Arghavan Nepton, Sonya C. Faber, Zachary A. Kaminsky et al.

Ketamine produces rapid antidepressant effects, but the molecular processes associated with their persistence remain poorly defined in humans. We examined longitudinal DNA methylation changes in 10 adults with major depressive disorder undergoing ketamine-assisted psychotherapy using two pre-treatment assessments (T1, T2) and one post-treatment assessment (T3). Participants received three...

Changes in trauma symptoms of discrimination after MDMA-assisted psychotherapy for posttraumatic stress disorder.

Scientific Reports July 11, 2026 Monnica T. Williams, Sonya C. Faber, Jordan Sloshower et al.

This preliminary study explored the effects of MDMA-assisted therapy on trauma symptoms related to discrimination, as measured by the Trauma Symptoms of Discrimination Scale (TSDS). A total of five diverse participants, who experienced multiple types of discrimination (e.g., gender, racial/ethnic, social class, age, sexual orientation), were assessed before and after treatment. A paired-samples...

Retreat from Racism: A Psychedelic Group Experience for Racial Stress and Trauma

Psychedelics July 1, 2026 Sergio Pérez Rosal, Sonya C. Faber, M. Myriah MacIntyre et al.

Background Racism and discrimination are pervasive social determinants of health, yet mainstream mental health care often fails to address the psychological sequelae of racial trauma, or race-based traumatic stress (RBTS). While psychedelic-assisted therapy (PAT) has re-entered the scientific mainstream, empirical guidance for culturally attuned, integrative care is limited. This study explores...

DOI: 10.1016/j.psyche.2026.100031 (opens in new tab) Stress linguistics Group periodic table Posttraumatic stress Ethnic group +2

Variability in outcomes and subjective effects of psychedelic use in psychotic populations: Case-based evidence from naturalistic settings

Psychedelics May 14, 2026 Joseph T. la Torre, Jade Gallo, Matteo Buonaroti et al.

This paper presents qualitative data reported by individuals with histories of psychotic symptoms and experiences who engaged in naturalistic psychedelic use compiled as a case series. Through detailed first-person narratives, we explore how both classic and non-classic psychedelic experiences were subjectively experienced and integrated by individuals in this population, which is usually...

DOI: 10.1016/j.psyche.2026.100021 (opens in new tab) Qualitative research Categorical variable Naturalism Naturalistic observation +5

The CAnadian Network for Psychedelic-Assisted Cancer Therapy (CAN-PACT): A Multi-Phase Program Overview.

Current Oncology December 22, 2025 Linda E. Carlson, Harriet Richardson, Ron Shore et al. 1 citation

The CAnadian Network for Psychedelic-Assisted Cancer Therapy (CAN-PACT) was launched in 2025 to address urgent gaps in supportive care for Canadians with cancer experiencing demoralization syndrome (loss of meaning, dysphoria, disheartenment, helplessness, a sense of failure) and related psychosocial distress. CAN-PACT has six major objectives: (1) to develop a national interdisciplinary...

Wolves Among Sheep: Sexual Violations in Psychedelic-Assisted Therapy.

The American Journal of Bioethics January 13, 2025 Tahlia R. Harrison, Sonya C. Faber, Manzar Zare et al. 22 citations

The integration of psychedelic substances into modern Western therapeutic practice has sparked a critical examination of many topics including: efficacy of psychedelics to treat mental health diagnoses without psychotherapeutic intervention, what models of therapy to use, and ethical implications related to altered states of consciousness. Of utmost concern are issues of power dynamics leading...

DOI: 10.1080/15265161.2024.2433423 (opens in new tab) Patient vulnerability Patient welfare Patient security Professional abuse +10

“The mushroom was more alive and vibrant”: Patient reports of synthetic versus organic forms of psilocybin

Journal of Psychedelic Studies October 29, 2024 Pamela Kryskow, Paul Stamets, Joseph T. la Torre et al. 4 citations

Abstract Interest in psychedelic research in the West is surging, however, clinical trials have almost exclusively studied synthetic compounds such as MDMA, ketamine, DMT, LSD, ibogaine, and psilocybin. To date, few clinical trials have utilized whole mushroom/plant material like Psilocybe mushrooms, Iboga, or Ayahuasca. Individuals participating in the Roots To Thrive Psilocybin-Assisted...

Expert recommendations for Germany’s integration of psychedelic-assisted therapy

BMC Medical Education October 24, 2024 Susanne Birnkammer, Olga Chernoloz, Sergio Pérez Rosal et al. 10 citations

As clinical trials for psychedelics move into phase III in the USA, Europe must address its lag in integrating professional education around psychedelic-assisted therapy (PAT) and supporting psychedelic drug research. This paper evaluates the necessary frameworks for implementing PAT in Germany, emphasizing the nation's potential leadership role within the European Union. With Australia having...

Experiences of psychedelic drug use among people with psychotic symptoms and disorders: Personal growth and mystical experiences

Journal of Psychedelic Studies July 31, 2024 Joseph T. la Torre, Jade Gallo, Mehdi Mahammadli et al. 6 citations

Individuals with a history of psychotic experiences and disorders such as schizophrenia, and mood disorders with psychotic features tend to be excluded from psychedelic-assisted therapy research and treatment programs, despite minimal research demonstrating heightened risk of adverse effects for this group. Participants (n = 100) were asked to complete an online, retrospective survey that asked...

Developing an Ethics and Policy Framework for Psychedelic Clinical Care: A Consensus Statement.

JAMA Network Open June 3, 2024 Amy L. Mcguire, I Glenn Cohen, Dominic Sisti et al. 41 citations

As government agencies around the globe contemplate approval of the first psychedelic medicines, many questions remain about their ethical integration into mainstream medical practice. To identify key ethics and policy issues related to the eventual integration of psychedelic therapies into clinical practice. From June 9 to 12, 2023, 27 individuals representing the perspectives of clinicians,...

Exploring effects and experiences of ketamine in group couples therapy

Journal of Psychedelic Studies May 6, 2024 Mark Cornfield, S. Mcbride, Joseph T. la Torre et al. 6 citations

This study contributes to the understanding of the efficacy, safety, and experience of ketamine-assisted therapy. The paper documents how individuals describe the effects of a protocolized and personalized use of ketamine (‘the relational dose’) in the context of group couples therapy based on Imago Relationship Therapy (IRT). Little is known about simultaneously administering ketamine to both...

Expert Opinion on Psychedelic-Assisted Psychotherapy for People with Psychopathological Psychotic Experiences and Psychotic Disorders

International Journal of Mental Health and Addiction April 1, 2024 Joseph T. Torre, Mehdi Mahammadli, Sonya C. Faber et al. 31 citations

Currently, individuals with personal or familial histories of psychopathological experiences of psychosis, psychotic spectrum disorders, bipolar disorder, and similar conditions are excluded from most psychedelic clinical trials, studies, and treatment programs. This study sought to determine why such an exclusion exists, what the implications of the exclusion criteria are, and if there was...

Psychedelics and Racial Justice

International Journal of Mental Health and Addiction April 1, 2024 Monnica T. Williams, Victor Cabral, Sonya C. Faber 22 citations

Psychedelics are being studied for the treatment of numerous mental health disorders, as well as a means of bringing people together. Nonetheless, people of color and those with other marginalized identities have not been fully included. Studies and research on psychedelic-assisted therapies have largely excluded people of color, leaving out fundamental clinical issues for these populations....

Navigating the “Psychedelic Renaissance”: From Research to Reality

International Journal of Mental Health and Addiction April 1, 2024 Doris Payer, Sukhpreet Klaire, Dominique Morisano et al. 4 citations

The field of psychedelics is in an important era, with a significant focus on the potential role of psychedelic compounds in the treatment of mental health and substance use disorders. In 2022, a scientific research conference was held in Toronto to bring together stakeholders from a variety of disciplines and to promote dialogue and collaboration. This Special Issue includes 8 papers based on...

Ketamine and epigenetic processes in depression, intersection between serotonergic and glutamatergic pathways

Journal of Psychedelic Studies March 29, 2024 Arghavan Nepton, Hesam Farahani, Monnica T. Williams et al. 2 citations

Abstract Background Hypotheses surrounding the etiology of depressive disorders encompass a wide range of biological changes that can occur in a depressed individual, from gene variations to epigenetic modifications and not only serotonergic mechanisms. Once again, the therapy response of the patient to antidepressants is connected to modifications in the epigenetic regulation of genes within...

Healing Words: Effects of Psychoeducation on Likelihood to Seek and Refer Psychedelic-Assisted Psychotherapy Among BIPOC Individuals.

Journal of Psychoactive Drugs 2024 Raymond Feng, Terence H. W. Ching, Amy Bartlett et al.

Psychedelic-assisted psychotherapy (PAP) is gaining renewed interest as a treatment for various mental disorders. However, there has been limited Black, Indigenous, and People of Color (BIPOC) representation in PAP clinical trials, signaling the need for culturally consonant communication about the efficacy and safety of PAP. We randomly assigned 321 BIPOC and 301 non-Hispanic White...

Investigating the associations of acute psychedelic experiences and changes in racial trauma symptoms, psychological flexibility, and substance use among People with Racial and Ethnic Minoritized Identities in the United States and Canada.

Journal of Substance Use and Addiction Treatment June 1, 2023 Angela M Haeny, Joel A Lopez, Pamela A Colón Grigas et al. 10 citations

Evidence suggests that psychedelics may serve as a therapeutic approach to reduce substance use; however, people with racial and ethnic minoritized (REM) identities are often excluded from this research. We investigated whether psychedelic use affects other substance use among REM people and whether perceived changes in psychological flexibility and racial trauma mediates this association. REM...

Building Psychedelic Studies as an Interdisciplinary Academic Field: Its Urgency and Its Challenges

International Journal for the Psychology of Religion 2023 Amy Bartlett, Anne Vallely, Monnica T. Williams et al. 9 citations

The field of psychedelic studies is expanding at a rapid pace and the need for academic institutions to engage more directly with this emergent field is growing. There have been some initial moves within the academy to begin tackling this evolving landscape, but these efforts have been relatively siloed along traditional disciplinary lines. Academic inquiry helps shape our collective engagement...

Top Ten Tips Palliative Care Clinicians Should Know About Psychedelic-Assisted Therapy in the Context of Serious Illness.

Journal of Palliative Medicine August 1, 2022 William E Rosa, Zachary Sager, Megan Miller et al. 49 citations

Psychedelic-assisted therapy (PAT) is a burgeoning treatment with growing interest across a variety of settings and disciplines. Empirical evidence supports PAT as a novel therapeutic approach that provides safe and effective treatment for people suffering from a variety of diagnoses, including treatment-resistant depression, substance use disorder, and post-traumatic stress disorder. Within...

Ethnoracial Inclusion in Clinical Trials of Ketamine in the Treatment of Mental Health Disorders

Journal of Studies on Alcohol and Drugs July 1, 2022 Timothy I. Michaels, Lebert Lester, Sara de la Salle et al. 19 citations

OBJECTIVE: Despite strong evidence for the safety and efficacy of ketamine in the treatment of mood disorders, the enrollment of Black, Indigenous, and People of Color (BIPOC) has not been a focus of this research. Health disparities in the treatment of mood disorders in BIPOC indicate a strong need to understand the clinical, social, and pharmacological aspects of this novel treatment in...

DOI: 10.15288/jsad.2022.83.596 (opens in new tab) Anxiety Ethnic group Mental health Inclusion mineral +8

MDMA-assisted therapy for posttraumatic stress disorder: A pooled analysis of ethnoracial differences in efficacy and safety from two Phase 2 open-label lead-in trials and a Phase 3 randomized, blinded placebo-controlled trial

Journal of Psychopharmacology June 21, 2022 Terence H. W. Ching, Monnica T. Williams, Julie B. Wang et al. 29 citations

Background: Limited ethnoracial diversity in previous ±3,4-methylenedioxymethamphetamine-assisted therapy (MDMA-AT) trials for posttraumatic stress disorder (PTSD) has prompted questions concerning whether Black, Indigenous, and People of Color (BIPOC) also benefit from this treatment. Methods: Secondary analysis was conducted using a modified intent-to-treat sample pooled from two Phase 2...

Race, Ethnic, and Sex Differences in Prevalence of and Trends in Hallucinogen Consumption Among Lifetime Users in the United States Between 2015 and 2019

Frontiers in Epidemiology March 23, 2022 Alan K. Davis, Brooke J. Arterberry, Yitong Xin et al. 20 citations

Background The current study is one of the first to examine race, ethnic, and sex differences in the prevalence of and trends in hallucinogen use among lifetime users in the United States. Methods Data came from the 2015–2019 National Survey on Drug Use and Health and included respondent's reporting ever-using hallucinogens ( n = 41,060; female = 40.4%). Descriptive and multinomial logistic...

DOI: 10.3389/fepid.2022.876706 (opens in new tab) Psilocybin Demography Pacific islanders Ethnic group +3

MDMA-Assisted Therapy for Posttraumatic Stress Disorder: A Mixed-Methods Case Study of a Participant of Color From an Open-Label Trial

Journal of Humanistic Psychology February 10, 2022 Terence H. W. Ching, Monnica T. Williams, Sara Reed et al. 10 citations

MDMA (±3,4-methylenedioxymethamphetamine)-assisted therapy (MDMA-AT) was shown in previous clinical trials to have promising efficacy and safety for alleviating treatment-resistant posttraumatic stress disorder (PTSD). However, due to low ethnoracial diversity, the question remains as to whether ethnoracial minority participants would benefit similarly. Thus, a mixed-methods case study was...

Expert Opinion on Psychedelic-Assisted Psychotherapy for People with Psychotic Symptoms

Research Square January 25, 2022 Joseph T. la Torre, Mehdi Mahammadli, Kyle T. Greenway et al. 18 citations preprint

Abstract Background Currently, personal or familial histories of psychotic symptoms are exclusionary criteria for most psychedelic clinical trials, studies, and treatment programs. This study sought to determine why such an exclusion exists, what the implications of the exclusion criteria are, and if there was agreement in expert opinion. Methods In-depth interviews with 12 experts in the...

Effects of Psychedelic Use on Racial Trauma Symptoms and Ethnic Identity among Asians in North America

Journal of Psychoactive Drugs January 11, 2022 Terence H. W. Ching, Alan K. Davis, Yitong Xin et al. 34 citations

There is a need to understand ways in which Asians in North America attempt to heal from racial trauma, given their well-documented high risk of exposure and associated adverse mental health outcomes. We conducted a secondary analysis of Asians from a survey of people of color in North America who have consumed psychedelics in response to racial discrimination. Ninety-two Asian participants...

DOI: 10.1080/02791072.2022.2025960 (opens in new tab) Ethnic group Mediation Demographics Clinical psychology +2