Psychedelics
April 20, 2026
José Carlos Bouso, Óscar Andión, Jordi Cantillo et al.
The Symmetrical Global Mental Health (Sym-GMH) paradigm proposes a reciprocal integration between traditional and Western medical systems. This prospective, longitudinal study evaluates the psychological outcomes of 264 Western participants who engaged in Shipibo-led ayahuasca retreats at the Temple of the Way of Light in the Peruvian Amazon. Over a 12-month period, participants completed...
European Neuropsychopharmacology
February 12, 2026
José Carlos Bouso, Óscar Andión, Sabela Fondevila Estévez et al.
The increasing interest in the therapeutic potential of psychedelics and cannabis underscores the need to understand their long-term neuropsychological and personality effects. This cross-sectional study compared regular users of ayahuasca (n = 69), cannabis (n = 56), and non-substance users (n = 94) on a battery of neuropsychological tasks and psychological questionnaires. Participants were...
Scientific Reports
September 1, 2025
Oscar Soto-Angona, Óscar Andión, Pablo Sabucedo et al.
3 citations
Preliminary evidence suggests that ayahuasca may alleviate severe grief symptoms. This three-arm, sequentially allocated, open-label study examines the therapeutic changes associated with ayahuasca-assisted meaning reconstruction therapy (A-MR) compared to meaning reconstruction therapy alone (MR) and a no-treatment control (NT). A total of 84 adults experiencing severe grief within 12 months...
PLOS mental health
2025
Óscar Andión, José Carlos Bouso, Jerome Sarris et al.
1 citation
Ayahuasca is a decoction native to the Amazon, where it plays a central role in the traditional medicine of many local cultures and has expanded internationally over the last decades. Ayahuasca has also attracted the interest of scientists for its potential benefits on mental health, but its adverse effects are under-researched. We analyzed data from the Global Ayahuasca Survey, including...
Frontiers in Psychiatry
2025
Pablo Sabucedo, Óscar Andión, Robert A Neimeyer et al.
correction
1 IntroductionGrieving the death of a loved one is a nearly universal experience, and one which may be experienced multiple times over the course of a lifetime. Recent studies have shown that, for each death, approximately nine relatives are directly affected (1). The loss of a first-degree family member significantly increases the risk of mortality, disease, and suicide for the mourner (2–6)....
Frontiers in Psychiatry
2024
Pablo Sabucedo, Óscar Andión, Robert A Neimeyer et al.
4 citations
Psychotherapy for Prolonged Grief Disorder (PGD), a condition characterized by an intense and persistent grief response, has received increased attention over the past decades. Evidence-based approaches to prevent PGD are currently scarce, and not always effective. This paper introduces a protocol for a clinical trial exploring the effectiveness of a Meaning Reconstruction psychotherapy...
PLOS global public health
2022
José Carlos Bouso, Óscar Andión, Jerome Sarris et al.
115 citations
Ayahuasca is a plant-based decoction native to Amazonia, where it has a long history of use in traditional medicine. Contemporary ritual use of ayahuasca has been expanding throughout the world for mental health purposes, and for spiritual and personal growth. Although researchers have been conducting clinical trials and observational studies reporting medical and psychological benefits, most...