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Dr Vince Polito, a clinical psychologist and Senior Research Fellow at Macquarie University鈥檚 School of Psychological Sciences, is leading a clinical trial to test the effectiveness of regular, tiny doses of a psychedelic drug on moderate depression.

The first participants are expected to begin their involvement early next year. The Macquarie-led trial involves collaborators from St Vincent鈥檚 黑料吃瓜群网, the Black Dog Institute, the George Institute, Monash University and the University of Sydney.

With very specific criteria required for the trial, including not taking traditional antidepressants, the team will not be calling for volunteers, instead relying on participating psychologists, psychiatrists and GPs to make referrals.

Low-dose formulation

Australian company Woke Pharmaceuticals, which is focused on psychedelic therapies for treatment of mental health, has developed a novel low-dose formulation of synthetic psilocybin, the active ingredient in magic mushrooms.

The company approached Polito to design and run a clinical trial to discover whether the product could be used as a treatment for depression. While there is emerging evidence showing the effectiveness of high doses of psilocybin combined with psychotherapy as a treatment for various forms of mental illness, this trial is the first to test the effectiveness of regular, small, sub-hallucinogenic doses to treat depression.

Polito is currently running a study to measure whether existing psylocibin microdosers experience improved creativity and other forms of cognitive enhancement.

鈥淗umans have been using magic mushrooms for their hallucinatory properties for thousands of years,鈥� Polito said.

鈥淢any cultures incorporated psychedelics such as psilocybin in their religious rituals, and in modern times these substances became popular during the 1960s, when they were an important part of the emerging counterculture.

鈥淧eople continue to use psilocybin today, and regular microdosers have reported anecdotally that small amounts of the drug improve their moods and relieve the symptoms of depression.

鈥淲e鈥檒l now be putting that to the test in a clinically controlled environment.鈥�

No 鈥榯rips鈥�

An application in 2021 to Australia鈥檚 Therapeutic Goods Administration to down-schedule psilocybin as a controlled medication was rejected, pending further clinical data, and it remains a prohibited substance that is only available for research and development in strictly controlled circumstances.

Polito has designed a double-blind clinical trial that will involve 266 adults over the age of 18 who experience moderate depression, the symptoms of which can impact an individual鈥檚 capacity to function normally.

The participants will be divided into two groups, with one group to receive two small doses of synthetic psilocybin in capsule form each week for six weeks and the second receiving a placebo.

Each dose will contain up to 5 mg of psilocybin. This is on the high end of what is considered a microdose, but substantially less than typical recreational doses, or doses used in previous psilocybin assisted psychotherapy trials, which are around 25 mg.

This means those involved in the trial will not experience the perceptual or cognitive changes that characterise a full psychedelic trip.

Participants will then undergo a range of tests and assessments including brain scans, regular psychological assessments and blood tests.

Assessing clinical efficacy

Nick Woolf, co-founder and CEO of Woke Pharmaceuticals, said the beginning of the clinical trial is an exciting time for the company.

鈥淢acquarie University was an obvious choice to run the trial because of its clinical track record, on鈥憇ite resources and access to relevant expertise.

鈥淒r Polito has assembled an exceptional interdisciplinary team that includes several of the most experienced psychedelic researchers within Australia, leading clinicians and prominent senior scientists.鈥�

Macquarie Medical School Deputy Dean (Research and Innovation) Professor Roger Chung sees the partnership with Woke Pharmaceuticals as an important initiative that draws on the university鈥檚 expertise both in cognitive and neurosciences and in clinical trials design and management.

鈥淭he emerging research area of microdosing psilocybin as a potential treatment for depression is a challenging one to study, and Vince and the investigator team have developed a robust trial design to assess clinical efficacy,鈥� he said.

鈥淲e鈥檒l be watching these outcomes with interest in coming years.鈥�

Image credit: 漏stock.adobe.com/au/Monkey Business