Pilot and feasibility studies
October 5, 2023
Carina Joy Donegan, Dimitri Daldegan-Bueno, Rachael Sumner et al.
23 citations
An estimated 260 million people worldwide have depression, and many self-treat with microdoses of psychedelics like LSD and psilocybin despite limited clinical evidence. A prior phase 1 study in healthy volunteers found LSD microdosing safe, well tolerated, and feasible with good adherence. This open-label pilot trial (LSDDEP1) will test tolerability and feasibility of an 8-week LSD microdosing regimen in 20 patients with major depressive disorder. Participants receive a sublingual LSD formulation (MB-22001) twice weekly at 5–15 µg. Tolerability is measured by withdrawal due to adverse events; feasibility by clinic visit attendance. Antidepressant response will be assessed with MADRS scores over 8 weeks. Results will inform a future randomized controlled trial.
Trials
August 24, 2024
Dimitri Daldegan-Bueno, Carina Joy Donegan, Anna Forsyth et al.
14 citations
A phase 2b randomized controlled trial will test whether repeated low doses of LSD (4 to 20 micrograms, taken twice weekly for 8 weeks at home) reduce depressive symptoms in people with major depressive disorder, compared to an active placebo. The trial is triple-blind and includes measures of mood, personality, sleep, brain activity, blood biomarkers, and safety. This is the first controlled trial to test microdosed LSD in patients' natural environment. Results will help determine whether psychedelic microdosing is a viable additional treatment for depression and guide future research.
Pilot and feasibility studies
February 12, 2024
Alesha Wells, A P Suresh Muthukumaraswamy, Eva Morunga et al.
10 citations
A proposed trial will test whether adding a low, non-hallucinogenic dose of LSD to meaning-centred psychotherapy (MCP) is feasible for advanced cancer patients with anxiety or depression. Forty participants (20 Māori, 20 non-Māori) will receive seven MCP sessions plus either an LSD microdose (4-20 µg) or a placebo, under double-blind conditions. Outcomes include feasibility, acceptability, safety, and psychological measures at baseline, during treatment, and at one- and six-month follow-ups. The study aims to determine whether a full-scale trial is possible and to provide initial evidence on whether microdosing may enhance psychological care in this population.
Journal of chromatographic science
November 15, 2025
Mahima Bansal, Estelle Miller, Rachael Sumner et al.
A new high-performance liquid chromatography method accurately measures LSD and separates it from its degradation product iso-LSD. Validated according to international guidelines, the method works even when LSD is exposed to stress conditions that cause breakdown. Applied to illicit microdosing samples from a New Zealand drug checking service, the analysis found a significant discrepancy between users' estimated doses and actual LSD levels. This highlights risks for people using non-pharmaceutical microdosing preparations and underscores the need for reliable quality control to ensure safety.