Psychedelic Science

Innovative solutions to critical mental health needs.

People of Color & Psychedelics

Igniting an International Conversation

Recently, there has been much excitement about the potential of psychedelic-assisted psychotherapy to address a multitude of mental health conditions, including depression, post-traumatic stress disorder, addiction, end-of-life anxiety, and other conditions. However, people of color have not been meaningfully included as research participants or researchers. With studies underway across the globe and expanding access to the benefits of these substances, space must be made for diverse voices and communities of color.

Oppression, poverty, and discrimination can all contribute to traumatic experiences at both individual and collective levels. These ongoing traumatic experiences — enhanced and compounded for people who exist at the intersection of multiple marginalized identities — are often under-recognized and thus under-treated. There is a vast potential for psychedelics to help heal trauma and move people toward wholeness.

Psychedelic Therapies

Dr. Williams is working to make psychedelic medicine accessible for everyone. In addition to board certification, an inter-jurisdictional practice certificate, and licensure in two countries, Dr. Monnica Williams is a certified psychedelic therapist through the MAPS MDMA Training Program (part A-D). She also offers psychedelic-assisted therapy at her clinics in Connecticut and Ottawa.

Online Training

Williams, M. T. (recorded). Culturally-Informed Outreach & Clinical Research: MDMA-Assisted Psychotherapy for PTSD. TZK Seminars. (3 CEs)

Psychedelics & Racial Justice

Online Learning from Dr. Monnica Williams

Psychedelics have been studied for the treatment of PTSD, depression, end-of-life anxiety, OCD, addictions, and a number of other mental health conditions. However, research studies of psychedelic psychotherapies have largely excluded people of color, leaving important questions unaddressed for these populations. In this video, Dr. Williams reviews relevant research, documenting exclusion based on the international literature. She will walk you through how ethnic minority mental health and psychedelic therapies may help or hinder healing for people of color. She will cover next steps in ensuring that access to culturally-informed care is prioritized as several psychedelics move into late phase trials and expanded access, including the importance of culturally-informed approaches and training focused on therapy providers of color. Save 29% through this affiliate link (1 CE).

Order Online

How do you talk to your kids about psychedelics?

Parents are often in the best place to teach their children about psychedelics in a safe way. Watch this special segment on families and psychedelics by Plant Parenthood, featuring Dr. Monnica Williams in Tripping Together: Boundaries and Bonds in Family Psychedelic Experiences.

Recent Presentations

Williams, M. T. (2023, October 26). Psychedelic Medicine and Racial Justice. Laird Lecture. University of Winnipeg, Winnipeg, MB.

Williams, M. T. & From-Tapp, R. (2023, July 13). Psychedelics and Racial Justice. Psychedelic Science Awareness (PSA) Speaker Series, The Whirling Tiger, Louisville, KY.

Williams, M. T. & Labate, B. (2023, May 4). Justice, Equity, Diversity & Inclusion in the Psychedelic Space: Progress or Roll-back? Chacruna Institute, San Francisco, CA.

Williams, M. T. (2023, April 18-19). Psychedelic-Assisted Therapy and Racial Justice. Psychedelics & Psychedelic-Assisted Therapy. Expanded States of Consciousness World Summit. [Virtual]

All Talks & Presentations

Recent & Media

Hynes, M. (2023, February 12). Psychedelic healing and trauma. Tapestry with Mary Hynes. CBC Radio.

Krishnan, M. (2022, December 20). ‘This Is Our Protest’: Black People Are Taking Shrooms to Heal From Racism. Vice.

Williams, A. (2022, November 28). Girls Trip: Why Some Black Women Are Using Psychedelic Mushrooms for Healing. Essence. November/December.

All Media Appearances

Published Psychedelics Papers


Ching, T., Williams, M., Reed, S., Kisicki, M., Wang, J., Yazar-Klosinski, B., Emerson, A., & Doblin, R. (in press). 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. Advance online.

Ching, T., Williams, M., Wang, J., Jerome, L., Yazar-Klosinski, B., Emerson, A., & Doblin, R. (2022). MDMA-assisted therapy for posttraumatic stress disorder: A pooled analysis of ethnoracial differences in efficacy and safety from a phase 2 open-label lead-in trial and phase 3 randomized, blinded placebo-controlled trial. Journal of Psychopharmacology, 36(8), 974-986.

Williams, M. T., Reed, S., & George, J. (2020). Culture and psychedelic psychotherapy: Ethnic and racial themes from three Black women therapists. Journal of Psychedelic Studies, 4(3), 125-138.

Williams, M. T., Reed, S., & Aggarwal, R. (2020). Culturally-informed research design issues in a study for MDMA-assisted psychotherapy for posttraumatic stress disorder. Journal of Psychedelic Studies, 4(1), 40–50. doi: 10.1556/2054.2019.016

Williams, M. T., & Leins, C. (2016). Race-based trauma: The challenge and promise of MDMA-assisted psychotherapy. Multidisciplinary Association for Psychedelic Studies (MAPS) Bulletin, 26(1), 32-37.

Abuse & Exploitation

Strauss, D., de la Salle, S., Sloshower, J., & Williams, M. T. (2022). Research abuses against people of colour and other vulnerable groups in early psychedelic research. Journal of Medical Ethics, 48(10), 728-737.

Strauss, D., Williams, M. T., Osman, M., & Gallo, J. (2022). Myths about race and racism on university campuses. In J. Faintuch & S. Faintuch (Eds.), Integrity of Scientific Research: Fraud, Misconduct and Fake News in the Academic, Medical and Social Environment (pp. 151–161). Springer.

Therapeutic Approach

Halstead, M., Reed, S., Krause, R., & Williams, M. T. (2021). Ketamine-assisted psychotherapy for PTSD related to experiences of racial discrimination. Clinical Case Studies, 20(4), 310-330.

Sloshower, J., Guss, J., Krause, R., Wallace, R., Williams, M., Reed, S., & Skinta, M. (2020). Psilocybin-assisted therapy of major depressive disorder using Acceptance and Commitment Therapy as a therapeutic frame. Journal of Contextual Behavioral Science, 15, 12-19.

Infrastructure & Training

Bartlett, A., Vallely, A., Williams, M. T., Nepton, A., & Feng, R. (in press). Building psychedelic studies as an interdisciplinary academic field: Its urgency and its challenges. International Journal for the Psychology of Religion (IJPR).

Rochester, J., Vallely, A., Grof, P., Williams, M., Chang, H., & Caldwell, K. (2022). Entheogens and psychedelics in Canada: Proposal for a new paradigm. Canadian Psychology, 63(3), 413–430.

Equity & Inclusion

Michaels, T. I., Lester, L., de la Salle, S., & Williams, M. T. (2022). Ethnoracial inclusion in randomized, double-blind, placebo-controlled clinical trials of ketamine in the treatment of mood disorders. Journal of Studies on Alcohol and Drugs, 83(4), 596–607.

Bartlett, A. & Williams, M. (2022). Valentina Pavlovna. El costo de la omisión y la importancia de corregir la historia. In E. Dyck, P. Farrell, B. C. Labate, C. Cavnar, I. Gabriell & G. L. De Assis (Eds.), Mujeres y psicodélicos: Descubriendo las voces invisibles (pp. 119-123). Lunaria Ediciones.

Fogg, C., Michaels, T. I., de la Salle, S., Jahn, Z. W., & Williams, M. T. (2021). Ethnoracial health disparities and the ethnopsychopharmacology of psychedelic medicine. Experimental and Clinical Psychopharmacology, 29(5), 539–554.

Williams, M. T. (2021). Why Black people should embrace psychedelic healing. In B. Labate & C. Cavnar (Eds.), Psychedelic Justice: Toward a Diverse and Equitable Psychedelic Culture (pp. 3-7). Synergetic Press. ISBN: 978-0907791-85-0.

Williams, M. T. (2021). When feminism functions as White supremacy: How White feminists oppress Black women. In B. Labate & C. Cavnar (Eds.), Psychedelic Justice: Toward a Diverse and Equitable Psychedelic Culture (pp. 21-27). Synergetic Press. ISBN: 978-0907791-85-0.

Campbell, M. & Williams, M. T. (2021). The ethic of access: An AIDS activist won public access to experimental therapies, and this must now extend to psychedelics for mental illness. Frontiers in Psychiatry, 12(680626), 1-5.

Williams, M. T., Bartlett, A., Michaels, T. I., Sevelius, J., & George, J. R. (2020). Dr. Valentina Wasson: Questioning what we think we know about the foundations of psychedelic science. Journal of Psychedelic Studies, 4(3), 146-148.

George, J. R., Michaels, T. I., Sevelius, J., & Williams, M. T. (2020). The psychedelic renaissance and the limitations of a White-dominant medical framework: A call for indigenous and ethnic minority inclusion. Journal of Psychedelic Studies, 4(1), 4-15. doi: 10.1556/2054.2019.015

Williams, M. T. & Labate, B. (2020). Introduction to Special Issue: Diversity, equity, and access in psychedelic medicine. Journal of Psychedelic Studies, 4(1), 1-3.

Michaels, T. I., Purdon, J., Collins, A. & Williams, M. T. (2018). Inclusion of people of color in psychedelic-assisted psychotherapy: A review of the literature. BMC Psychiatry, 18(245), 1-9. doi: 10.1186/s12888-018-1824-6.


Davis, A. K., Arterberry, B. J., Xina, Y., Agin-Liebese, G., Schwarting, C., & Williams, M. T. (2022). Race, ethnic, and sex differences in prevalence of and trends in hallucinogen consumption among lifetime users in the United States between 2015-2019. Frontiers in Epidemiology, 2, 876706.

Jahn, Z. W., Lopez, J., de la Salle, S., Faber, S., & Williams, M. T. (2021). Racial/Ethnic differences in prevalence for hallucinogen use by age cohort: Findings from the 2018 National Survey on Drug Use and Health. Journal of Psychedelic Studies, 5(2), 69-82.

Chacruna lecture in SF 2023 Davos 2022 Dr. Monnica Williams in Amsterdam with Paul Stamets and Pamela Kryskow Ecuador 2022 Dr. Monnica Williams at Psychedelic Science 2017 Davos 2022
Karaoke at R2R April 2022

Racial Trauma

Haeny, A. H., Lopez, J., Grigas, P. C., Crouch, M., Davis, A. K., & Williams, M. (2023). 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, 149, 209035.

Ching, T., Davis, A. K., Xin, Y., & Williams, M. T. (2023). Effects of psychedelic use on racial trauma symptoms and ethnic identity among Asians in North America. Journal of Psychoactive Drugs, 55(1), 19-29.

De la Salle, S., Davis, D. D., Gran-Ruaz, S., Davis, A. K., & Williams, M. T. (2022). Acute and enduring effects of psychedelic use among Indigenous peoples in Canada and the United States. Canadian Psychology, 63(4), 589–607.

Davis, A. K., Xin, Y., Sepeda, N. D., Garcia-Romeu, A., & Williams, M. T. (2021). Increases in psychological flexibility mediate the relationship between acute psychedelic effects and decreases in racial trauma symptoms among people of color. Chronic Stress, 5, 1-10.

Williams, M., Davis, A., Xin, Y., Sepeda, N., Colon-Grigas, P., Sinnott, S., & Haeny, A. (2021). People of color in North America report improvements in racial trauma and mental health symptoms following psychedelic experiences. Drugs: Education, Prevention & Policy, 28(3), 215-226.

End of Life

Beaussant, Y., Tulsky, J., Guérin, B., Schwarz-Plaschg, C., Sanders, J., & the Radcliffe Institute for Advanced Studies Working Group on Psychedelic Research in Serious Illness. (2021). Mapping an agenda for psychedelic-assisted therapy research in patients with serious illness. Journal of Palliative Medicine, 24 (11), 1657-1666.

Rosa, W. E., Sager, Z., Miller, M., Bernstein, I., Rinaldi, A. D., Addicott, K., Ljuslin, M., Adrian, C., Back, A. L., Beachy, J., Bossis, A. P., Breitbart, W. S., Cosimano, M. P., Fischer, S. M., Guss, J., Knighton, E., Phelps, J., Richards, B. D., Richards, W. A., Tulsky, J. A., Williams, M. T., & Beaussant, Y. (2022). Top ten tips palliative care clinicians should know about psychedelic-assisted therapy in the context of serious illness. Journal of Palliative Medicine, 25(8), 1273-1281.

All Publications

McGill Palliative Care Congress 2022
Karaoke at R2R April 2022

Conference Planning

  • Conference Planning Committee, Psychedelic-Assisted Therapies: Contrasting Visions, Harvard University, February 2024, Boston, MA
  • Conference Planning Commmittee, Psychedelic Medicine Conference, Dec 9-13, 2023, Tel Aviv, Israel
  • Conference Planning Committee, Psychedelic-Assisted Therapies: Promise and Perils, Harvard University, February 2023, Boston, MA
  • Conference Planning Leadership Team, Global Summit on Psychedelic-Assisted Therapies and Medicines: From Research to Reality, May 2022, Toronto, ON

Popular Books and Videos by Dr. Monnica Williams


Managing Microaggressions

Addressing Everyday Racism in Therapeutic Spaces


Mental Health

Eliminating Race-Based Disparities: Equity and Culturally Responsive Care


Transforming Therapy

Being the Change: Embracing Antiracism in the Therapy Room


Equity and Access to Care

Psychedelics & Racial Justice