Palliative care has proven to be one of the most promising fields for research on interventions with psychedelic substances. One of the most prominent researchers in this area was the American psychopharmacologist Roland Griffiths, PhD.
In 2016, Dr. Griffiths and his team at Johns Hopkins University in Baltimore, Maryland, published one of the most relevant contributions to the field by demonstrating in a placebo-controlled study that psilocybin can reduce depressive and anxiety symptoms in patients with cancer. The study, conducted with 51 patients diagnosed with advanced-stage cancer, compared the effects of a low dose and a high dose of psilocybin, showing that the high dose resulted in improvements in mood, quality of life, and sense of life, reducing death-related anxiety.
In 2021, after a routine examination, Dr. Griffiths himself was diagnosed with advanced colon cancer. Unexpectedly, the researcher found himself in the position of his research subjects. In an interview with The New York Times in April 2023, he stated that, after some resistance, he agreed to undergo an LSD session.
In the conversation, he revealed that he had a 50% chance of being alive by Halloween. Despite the diagnosis, he showed no discouragement. “As a scientist, I feel like a kid in a candy store, considering all the research and questions that need to be answered about psychedelics and the theme of human flourishing,” he said.
In his last months of life, in the various appearances and interviews he gave, Dr. Griffiths demonstrated a perception of life uncommon in people facing death. “I’m excited to communicate, to shake off the dust and tell people: ‘Come on, wake up!’ ”
He passed away on October 16, 2023, at age 77 years, opening new horizons for clinical research with psychedelics and becoming an example of the therapeutic potential of these substances.
Innovative Treatments
“I believe this will be one of the next conditions, if not the next condition, to be considered for the designation of innovative treatment in future psilocybin regulation in the United States, where the field is more advanced,” said Lucas Maia, PhD, a psychopharmacologist and researcher affiliated with the Advanced Center for Psychedelic Medicine (CAMP) at the Federal University of Rio Grande do Norte (UFRN) and the Interdisciplinary Cooperation for Ayahuasca Research and Outreach (ICARO) at the State University of Campinas in São Paulo, Brazil.
Currently, MDMA (for the treatment of posttraumatic stress disorder), psilocybin (for depressive disorder), and MM120 (an LSD analogue used to treat generalized anxiety disorder) are the only psychedelic substances that have received the designation of innovative treatment by the Food and Drug Administration (FDA).
In 2022, Dr. Maia and a colleague from ICARO, Ana Cláudia Mesquita Garcia, PhD, a professor at the School of Nursing at the Federal University of Alfenas in Brazil and leader of the Interdisciplinary Center for Studies in Palliative Care, published a systematic review in the Journal of Pain and Symptom Management that evaluated the use of psychedelic-assisted treatments for symptom control in patients with serious or terminal illnesses.
Of the 20 articles reviewed, 9 (45%) used LSD, 5 (25%) psilocybin, 2 (10%) dipropyltryptamine (DPT), 1 (5%) used ketamine, and 1 (5%) used MDMA. In 10% of the studies, LSD and DPT were combined. Altogether, 347 participants (54%) received LSD, 116 (18%) psilocybin, 81 (13%) LSD and DPT, 64 (10%) DPT, 18 (3%) MDMA, and 14 (2%) ketamine.
The conclusion of the study is that psychedelics provide therapeutic effects on physical, psychological, social, and existential outcomes. They are associated with a reduction in pain and improvement in sleep. A decrease in depressive and anxiety symptoms is also observed; such symptoms are common in patients with serious diseases. In addition, interpersonal relationships become closer and more empathetic. Finally, there is a reduction in the fear of death and suffering, an increase in acceptance, and a redefinition of the disease.
In 55% of the studies, the adverse effects were mild to moderate and transient. They included nausea, vomiting, dry mouth, and fatigue, as well as anxiety, panic, and hallucinations. The researchers concluded that the scarcity and difficulty of access to professional training in psychedelic-assisted treatments represent a significant challenge for the advancement of these interventions, especially in countries in the Global South.
Another systematic review and meta-analysis published in July by researchers at the University of Michigan in Ann Arbor, Michigan, included seven studies with 132 participants and showed significant improvements in quality of life, pain control, and anxiety relief after psychedelic-assisted psychotherapy with psilocybin. The combined effects indicated statistically significant reductions in anxiety symptoms after 4.0-4.5 months and after 6.0-6.5 months post administration, compared with the initial evaluations.
One of the most advanced research studies currently being conducted is led by Stephen Ross, MD, a psychiatrist affiliated with New York University’s Langone Medical Center, New York City. The phase 2b clinical study is randomized, double blind, and placebo controlled, and involves 300 participants. The study aims to evaluate the effects of psilocybin-assisted psychotherapy on psychiatric and existential distress in patients with advanced cancer. Its expected completion date is in 2027.
“We still lack effective interventions in minimizing psychological, spiritual, and existential suffering,” said Dr. Garcia. “In this sense, respecting the contraindications of a physical nature (including pre-existing illnesses at study initiation, disease staging, patient functionality level, comorbidities, concurrent pharmacological treatments, etc) and of a psychiatric nature for the use of psychedelics, depending on the clinical picture, end-of-life patients facing existential crises and psychological suffering will likely benefit more from psychedelic-assisted psychotherapy, which highlights the need for more research and the integration of this treatment into clinical practice.”